diff --git a/packages/common/utils/platforms.ts b/packages/common/utils/platforms.ts
index c0d84326..370a148c 100644
--- a/packages/common/utils/platforms.ts
+++ b/packages/common/utils/platforms.ts
@@ -1,25 +1,33 @@
-export function platformResolver(platform: string) {
-    let platformType = '';
-    let platformFileType = '';
-    let platformCommand = '';
+export type Platform = 'windows' | 'linux' | 'macos' | 'unknown';
+
+interface IPlatform {
+    type: Platform;
+    fileType: string;
+    command: string;
+}
+
+export function platformResolver(platform: string): IPlatform {
+    let type: Platform = 'unknown';
+    let fileType = '';
+    let command = '';
 
     switch (platform) {
         case 'win32':
-            platformType = 'windows';
-            platformFileType = '.exe';
-            platformCommand = 'start ""';
+            type = 'windows';
+            fileType = '.exe';
+            command = 'start ""';
             break;
 
         case 'linux':
-            platformType = 'linux';
-            platformCommand = 'xdg-open';
+            type = 'linux';
+            command = 'xdg-open';
             break;
 
         case 'darwin':
-            platformType = 'macos';
-            platformCommand = 'open -R';
+            type = 'macos';
+            command = 'open -R';
             break;
     }
 
-    return { platformType, platformFileType, platformCommand };
+    return { type, fileType, command };
 }
diff --git a/packages/server/router/index.ts b/packages/server/router/index.ts
index 8df35662..feadfdcf 100644
--- a/packages/server/router/index.ts
+++ b/packages/server/router/index.ts
@@ -34,7 +34,9 @@ const pkgAssetsPath =
 
 export default function buildBaseApi(server: Server) {
     server.app.route('/json', 'GET', (req, res) => {
-        const osuInstance: any = req.instanceManager.getInstance();
+        const osuInstance: any = req.instanceManager.getInstance(
+            req.instanceManager.focusedClient
+        );
         if (!osuInstance) {
             res.statusCode = 500;
             wLogger.debug('/json', 'not_ready');
@@ -175,8 +177,8 @@ export default function buildBaseApi(server: Server) {
                     `PP Counter opened: ${folderName} (${req.headers.referer})`
                 );
 
-                const { platformCommand } = platformResolver(process.platform);
-                exec(`${platformCommand} "${folderPath}"`, (err) => {
+                const platform = platformResolver(process.platform);
+                exec(`${platform.command} "${folderPath}"`, (err) => {
                     if (err) {
                         wLogger.error('Error opening file explorer:');
                         wLogger.debug(err);
@@ -393,7 +395,9 @@ export default function buildBaseApi(server: Server) {
         try {
             const query: any = req.query;
 
-            const osuInstance: any = req.instanceManager.getInstance();
+            const osuInstance: any = req.instanceManager.getInstance(
+                req.instanceManager.focusedClient
+            );
             if (!osuInstance) {
                 res.statusCode = 500;
                 return sendJson(res, { error: 'not_ready' });
diff --git a/packages/server/router/scApi.ts b/packages/server/router/scApi.ts
index 9ba14af6..a287afdc 100644
--- a/packages/server/router/scApi.ts
+++ b/packages/server/router/scApi.ts
@@ -3,7 +3,9 @@ import { beatmapFileShortcut } from '../scripts/beatmapFile';
 
 export default function buildSCApi(app: HttpServer) {
     app.route('/json/sc', 'GET', (req, res) => {
-        const osuInstance: any = req.instanceManager.getInstance();
+        const osuInstance: any = req.instanceManager.getInstance(
+            req.instanceManager.focusedClient
+        );
         if (!osuInstance) {
             res.statusCode = 500;
             return sendJson(res, { error: 'not_ready' });
diff --git a/packages/server/router/v1.ts b/packages/server/router/v1.ts
index 1137ca48..66d41071 100644
--- a/packages/server/router/v1.ts
+++ b/packages/server/router/v1.ts
@@ -8,7 +8,9 @@ export default function buildV1Api(app: HttpServer) {
         try {
             const url = req.pathname || '/';
 
-            const osuInstance: any = req.instanceManager.getInstance();
+            const osuInstance: any = req.instanceManager.getInstance(
+                req.instanceManager.focusedClient
+            );
             if (!osuInstance) {
                 res.statusCode = 500;
                 return sendJson(res, { error: 'not_ready' });
diff --git a/packages/server/router/v2.ts b/packages/server/router/v2.ts
index da000efd..940c35ec 100644
--- a/packages/server/router/v2.ts
+++ b/packages/server/router/v2.ts
@@ -7,7 +7,9 @@ import { directoryWalker } from '../utils/directories';
 
 export default function buildV2Api(app: HttpServer) {
     app.route('/json/v2', 'GET', (req, res) => {
-        const osuInstance: any = req.instanceManager.getInstance();
+        const osuInstance: any = req.instanceManager.getInstance(
+            req.instanceManager.focusedClient
+        );
         if (!osuInstance) {
             res.statusCode = 500;
             return sendJson(res, { error: 'not_ready' });
@@ -18,7 +20,9 @@ export default function buildV2Api(app: HttpServer) {
     });
 
     app.route('/json/v2/precise', 'GET', (req, res) => {
-        const osuInstance: any = req.instanceManager.getInstance();
+        const osuInstance: any = req.instanceManager.getInstance(
+            req.instanceManager.focusedClient
+        );
         if (!osuInstance) {
             res.statusCode = 500;
             return sendJson(res, { error: 'not_ready' });
@@ -38,7 +42,9 @@ export default function buildV2Api(app: HttpServer) {
         try {
             const url = req.pathname || '/';
 
-            const osuInstance: any = req.instanceManager.getInstance();
+            const osuInstance: any = req.instanceManager.getInstance(
+                req.instanceManager.focusedClient
+            );
             if (!osuInstance) {
                 res.statusCode = 500;
                 return sendJson(res, { error: 'not_ready' });
@@ -69,7 +75,9 @@ export default function buildV2Api(app: HttpServer) {
         try {
             const url = req.pathname || '/';
 
-            const osuInstance: any = req.instanceManager.getInstance();
+            const osuInstance: any = req.instanceManager.getInstance(
+                req.instanceManager.focusedClient
+            );
             if (!osuInstance) {
                 res.statusCode = 500;
                 return sendJson(res, { error: 'not_ready' });
diff --git a/packages/server/scripts/beatmapFile.ts b/packages/server/scripts/beatmapFile.ts
index d4528ef5..21433998 100644
--- a/packages/server/scripts/beatmapFile.ts
+++ b/packages/server/scripts/beatmapFile.ts
@@ -14,7 +14,9 @@ export function beatmapFileShortcut(
     try {
         const url = req.pathname || '/';
 
-        const osuInstance: any = req.instanceManager.getInstance();
+        const osuInstance: any = req.instanceManager.getInstance(
+            req.instanceManager.focusedClient
+        );
         if (!osuInstance) {
             res.statusCode = 500;
             return sendJson(res, { error: 'not_ready' });
diff --git a/packages/server/utils/socket.ts b/packages/server/utils/socket.ts
index 161b8bab..2483ca3b 100644
--- a/packages/server/utils/socket.ts
+++ b/packages/server/utils/socket.ts
@@ -126,7 +126,9 @@ export class Websocket {
     startLoop() {
         this.loopInterval = setInterval(() => {
             try {
-                const osuInstance: any = this.instanceManager.getInstance();
+                const osuInstance: any = this.instanceManager.getInstance(
+                    this.instanceManager.focusedClient
+                );
                 if (!osuInstance || this.clients.size === 0) {
                     return; // Exit the loop if conditions are not met
                 }
diff --git a/packages/tosu/src/api/utils/buildResult.ts b/packages/tosu/src/api/utils/buildResult.ts
index 55dea98a..fafec9c3 100644
--- a/packages/tosu/src/api/utils/buildResult.ts
+++ b/packages/tosu/src/api/utils/buildResult.ts
@@ -30,7 +30,9 @@ const convertMemoryPlayerToResult = (
 });
 
 export const buildResult = (instanceManager: InstanceManager): ApiAnswer => {
-    const osuInstance = instanceManager.getInstance();
+    const osuInstance = instanceManager.getInstance(
+        instanceManager.focusedClient
+    );
     if (!osuInstance) {
         return { error: 'not_ready' };
     }
diff --git a/packages/tosu/src/api/utils/buildResultSC.ts b/packages/tosu/src/api/utils/buildResultSC.ts
index 61bc2701..447183da 100644
--- a/packages/tosu/src/api/utils/buildResultSC.ts
+++ b/packages/tosu/src/api/utils/buildResultSC.ts
@@ -14,7 +14,9 @@ import { fixDecimals } from '@/utils/converters';
 import { ApiAnswer } from '../types/sc';
 
 export const buildResult = (instanceManager: InstanceManager): ApiAnswer => {
-    const osuInstance = instanceManager.getInstance();
+    const osuInstance = instanceManager.getInstance(
+        instanceManager.focusedClient
+    );
     if (!osuInstance) {
         return { error: 'not_ready' };
     }
diff --git a/packages/tosu/src/api/utils/buildResultV2.ts b/packages/tosu/src/api/utils/buildResultV2.ts
index 37d5c767..9c29d867 100644
--- a/packages/tosu/src/api/utils/buildResultV2.ts
+++ b/packages/tosu/src/api/utils/buildResultV2.ts
@@ -78,7 +78,9 @@ const convertMemoryPlayerToResult = (
 };
 
 export const buildResult = (instanceManager: InstanceManager): ApiAnswer => {
-    const osuInstance = instanceManager.getInstance();
+    const osuInstance = instanceManager.getInstance(
+        instanceManager.focusedClient
+    );
     if (!osuInstance) {
         return { error: 'not_ready' };
     }
diff --git a/packages/tosu/src/api/utils/buildResultV2Precise.ts b/packages/tosu/src/api/utils/buildResultV2Precise.ts
index c7f31e5f..4e70358f 100644
--- a/packages/tosu/src/api/utils/buildResultV2Precise.ts
+++ b/packages/tosu/src/api/utils/buildResultV2Precise.ts
@@ -48,7 +48,9 @@ const buildTourneyData = (
 };
 
 export const buildResult = (instanceManager: InstanceManager): ApiAnswer => {
-    const osuInstance = instanceManager.getInstance();
+    const osuInstance = instanceManager.getInstance(
+        instanceManager.focusedClient
+    );
     if (!osuInstance) {
         return { error: 'not_ready' };
     }
diff --git a/packages/tosu/src/index.ts b/packages/tosu/src/index.ts
index d7d56e92..264fd358 100644
--- a/packages/tosu/src/index.ts
+++ b/packages/tosu/src/index.ts
@@ -41,4 +41,5 @@ const currentVersion = require(process.cwd() + '/_version.js');
 
     httpServer.start();
     instanceManager.runWatcher();
+    instanceManager.runDetemination();
 })();
diff --git a/packages/tosu/src/instances/manager.ts b/packages/tosu/src/instances/manager.ts
index e69a4442..db37bba4 100644
--- a/packages/tosu/src/instances/manager.ts
+++ b/packages/tosu/src/instances/manager.ts
@@ -1,4 +1,10 @@
-import { argumetsParser, wLogger } from '@tosu/common';
+import {
+    ClientType,
+    Platform,
+    argumetsParser,
+    platformResolver,
+    wLogger
+} from '@tosu/common';
 import { Process } from 'tsprocess/dist/process';
 
 import { AbstractInstance } from '@/instances';
@@ -7,6 +13,9 @@ import { LazerInstance } from './lazerInstance';
 import { OsuInstance } from './osuInstance';
 
 export class InstanceManager {
+    platformType: Platform;
+    focusedClient: ClientType;
+
     osuInstances: {
         [key: number]: AbstractInstance;
     };
@@ -15,19 +24,33 @@ export class InstanceManager {
         this.osuInstances = {};
 
         this.runWatcher = this.runWatcher.bind(this);
+        this.runDetemination = this.runDetemination.bind(this);
     }
 
     /**
      * Gets a regular instance if osu running in normal mode, else gets tournament manager
      */
-    public getInstance() {
+    public getInstance(clientType?: ClientType) {
         if (Object.keys(this.osuInstances).length === 0) return;
 
         for (const key in this.osuInstances) {
-            if (this.osuInstances[key].isTourneyManager) {
-                return this.osuInstances[key];
+            const instance = this.osuInstances[key];
+            const ClientFilter =
+                typeof ClientType[clientType as any] !== 'undefined'
+                    ? instance.client === clientType
+                    : true;
+
+            if (instance.isTourneyManager && ClientFilter) {
+                return instance;
             }
         }
+
+        if (typeof clientType === 'number') {
+            const search = Object.values(this.osuInstances).find(
+                (r) => r.client === clientType
+            );
+            return search;
+        }
         return Object.values(this.osuInstances)[0];
     }
 
@@ -100,4 +123,37 @@ export class InstanceManager {
 
         setTimeout(this.runWatcher, 1000);
     }
+
+    runDetemination() {
+        if (!this.platformType) {
+            const platform = platformResolver(process.platform);
+            this.platformType = platform.type;
+        }
+
+        if (this.platformType !== 'windows') return;
+
+        const s1 = performance.now();
+        const focusedPID = Process.getFocusedProcess();
+        const instance = Object.values(this.osuInstances).find(
+            (r) => r.pid === focusedPID
+        );
+        if (instance) this.focusedClient = instance.client;
+
+        if (this.focusedClient === undefined) {
+            this.focusedClient =
+                this.getInstance()?.client || ClientType.stable;
+        }
+
+        console.log(
+            'focused',
+            ClientType[this.focusedClient],
+            Object.values(this.osuInstances).map((r) => ({
+                id: r.pid,
+                client: r.client
+            })),
+            performance.now() - s1
+        );
+
+        setTimeout(this.runDetemination, 100);
+    }
 }
diff --git a/packages/updater/index.ts b/packages/updater/index.ts
index ddab272b..0ddbfe48 100644
--- a/packages/updater/index.ts
+++ b/packages/updater/index.ts
@@ -19,7 +19,7 @@ const platform = platformResolver(process.platform);
 const fileDestination = path.join(getProgramPath(), 'update.zip');
 const backupExecutablePath = path.join(
     getProgramPath(),
-    `tosu_old${platform.platformFileType}`
+    `tosu_old${platform.fileType}`
 );
 
 const deleteNotLocked = async (filePath: string) => {
@@ -41,7 +41,7 @@ export const checkUpdates = async () => {
     wLogger.info('Checking updates');
 
     try {
-        if (platform.platformType === '') {
+        if (platform.type === 'unknown') {
             wLogger.warn(
                 `Unsupported platform (${process.platform}). Unable to run updater`
             );
@@ -107,14 +107,10 @@ export const autoUpdater = async () => {
         }
 
         const findAsset = assets.find(
-            (r) =>
-                r.name.includes(platform.platformType) &&
-                r.name.endsWith('.zip')
+            (r) => r.name.includes(platform.type) && r.name.endsWith('.zip')
         );
         if (!findAsset) {
-            wLogger.info(
-                `Files to update not found (${platform.platformType})`
-            );
+            wLogger.info(`Files to update not found (${platform.type})`);
             return 'noFiles';
         }