diff --git a/app/src/main/scala/app/logorrr/util/CpResource.scala b/app/src/main/scala/app/logorrr/util/CpResource.scala
deleted file mode 100644
index 59a19537..00000000
--- a/app/src/main/scala/app/logorrr/util/CpResource.scala
+++ /dev/null
@@ -1,3 +0,0 @@
-package app.logorrr.util
-
-abstract class CpResource(value: String)
diff --git a/app/src/main/scala/app/logorrr/util/Encoding.scala b/app/src/main/scala/app/logorrr/util/Encoding.scala
deleted file mode 100644
index 1604e026..00000000
--- a/app/src/main/scala/app/logorrr/util/Encoding.scala
+++ /dev/null
@@ -1,9 +0,0 @@
-package app.logorrr.util
-
-import java.nio.charset.Charset
-
-object Encoding {
-
-  val Utf8: Charset = Charset.forName("UTF-8")
-
-}
diff --git a/app/src/main/scala/app/logorrr/util/ImageCp.scala b/app/src/main/scala/app/logorrr/util/ImageCp.scala
index 1ad62d14..c00bf8bd 100644
--- a/app/src/main/scala/app/logorrr/util/ImageCp.scala
+++ b/app/src/main/scala/app/logorrr/util/ImageCp.scala
@@ -5,6 +5,8 @@ import javafx.scene.image.{Image, ImageView}
 import java.util.Properties
 
 
+abstract class CpResource(value: String)
+
 case class PropsCp(classPathResource : String) extends CpResource(classPathResource) {
 
   def asProperties(clazz: Class[_]): Properties = {
diff --git a/app/src/main/scala/app/logorrr/util/JfxEventHandler.scala b/app/src/main/scala/app/logorrr/util/JfxEventHandler.scala
deleted file mode 100644
index a0173d11..00000000
--- a/app/src/main/scala/app/logorrr/util/JfxEventHandler.scala
+++ /dev/null
@@ -1,9 +0,0 @@
-package app.logorrr.util
-
-import javafx.event.{Event, EventHandler}
-
-object JfxEventHandler {
-
-  def apply[E <: Event](f: E => Unit): EventHandler[E] = (e: E) => f(e)
-
-}
diff --git a/app/src/main/scala/app/logorrr/util/JfxUtils.scala b/app/src/main/scala/app/logorrr/util/JfxUtils.scala
index 1de5059a..99dee067 100644
--- a/app/src/main/scala/app/logorrr/util/JfxUtils.scala
+++ b/app/src/main/scala/app/logorrr/util/JfxUtils.scala
@@ -7,7 +7,6 @@ import javafx.stage.{Stage, WindowEvent}
 
 object JfxUtils extends CanLog {
 
-
   def execOnUiThread(f: => Unit): Unit = {
     if (!Platform.isFxApplicationThread) {
       Platform.runLater(() => f)
diff --git a/app/src/main/scala/app/logorrr/util/LogFileUtil.scala b/app/src/main/scala/app/logorrr/util/LogFileUtil.scala
deleted file mode 100644
index 63401e86..00000000
--- a/app/src/main/scala/app/logorrr/util/LogFileUtil.scala
+++ /dev/null
@@ -1,11 +0,0 @@
-package app.logorrr.util
-
-import java.nio.file.Paths
-
-object LogFileUtil {
-
-  /** compute file name from a LogFilePath */
-  def logFileName(pathAsString: String): String =
-    Paths.get(pathAsString).getFileName.toString
-
-}
diff --git a/app/src/main/scala/app/logorrr/util/LogUtil.scala b/app/src/main/scala/app/logorrr/util/LogUtil.scala
deleted file mode 100644
index b02647a4..00000000
--- a/app/src/main/scala/app/logorrr/util/LogUtil.scala
+++ /dev/null
@@ -1,25 +0,0 @@
-package app.logorrr.util
-
-import org.apache.commons.io.output.ByteArrayOutputStream
-
-import java.io.PrintStream
-
-/**
- * to debug System.err and System.in streams
- */
-object LogUtil {
-
-  private def mkStream(baos: ByteArrayOutputStream): PrintStream = {
-    val ps = new PrintStream(baos, true, StringUtil.utf8)
-    ps
-  }
-
-  val errBackingStream = new ByteArrayOutputStream()
-  val outBackingStream = new ByteArrayOutputStream()
-
-  def init(): Unit = {
-    System.setOut(mkStream(outBackingStream))
-    System.setErr(mkStream(errBackingStream))
-  }
-
-}
diff --git a/app/src/main/scala/app/logorrr/util/LogoRRRFileChooser.scala b/app/src/main/scala/app/logorrr/util/LogoRRRFileChooser.scala
index 229ee208..1e4c8790 100644
--- a/app/src/main/scala/app/logorrr/util/LogoRRRFileChooser.scala
+++ b/app/src/main/scala/app/logorrr/util/LogoRRRFileChooser.scala
@@ -5,16 +5,4 @@ import javafx.stage.{FileChooser, Window}
 
 import java.nio.file.Path
 
-class LogoRRRFileChooser(title: String) {
 
-  def showAndWait(window: Window): Option[Path] = {
-    val fc = new FileChooser
-    fc.setTitle(title)
-    LogoRRRGlobals.getSomeLastUsedDirectory.foreach(d => fc.setInitialDirectory(d.toFile))
-    val somePath = Option(fc.showOpenDialog(window)).map(_.toPath)
-    LogoRRRGlobals.setSomeLastUsedDirectory(somePath.map(_.getParent))
-    LogoRRRGlobals.persist()
-    somePath
-  }
-
-}
diff --git a/app/src/main/scala/app/logorrr/util/StringUtil.scala b/app/src/main/scala/app/logorrr/util/StringUtil.scala
deleted file mode 100644
index dd84543f..00000000
--- a/app/src/main/scala/app/logorrr/util/StringUtil.scala
+++ /dev/null
@@ -1,15 +0,0 @@
-package app.logorrr.util
-
-import java.nio.charset.StandardCharsets
-
-object StringUtil {
-
-  val utf8: String = StandardCharsets.UTF_8.name()
-
-  /** handy for conversions where T has a string representation. if f returns null, a 'n/a' string will be displayed */
-  def tOrNa[T](f: => T): String = Option(f) match {
-    case Some(value) => value.toString
-    case None => "n/a"
-  }
-
-}
diff --git a/app/src/main/scala/app/logorrr/util/Throttler.scala b/app/src/main/scala/app/logorrr/util/Throttler.scala
deleted file mode 100644
index 58aac7d7..00000000
--- a/app/src/main/scala/app/logorrr/util/Throttler.scala
+++ /dev/null
@@ -1,43 +0,0 @@
-package app.logorrr.util
-
-import scala.concurrent.{CancellationException, ExecutionContext, Future, Promise}
-import scala.util.{Failure, Success}
-
-/**
- * Simple implementation to throttle signals for an api
- *
- * @param api the (blocking) api to call
- * @param ec  Execution Context to run on
- * @tparam A input type
- * @tparam B output type
- */
-class Throttler[A, B](api: A => B)(implicit ec: ExecutionContext)  {
-  @volatile private var ongoingComputation: Option[(Promise[B], Future[B])] = None
-
-  def process(input: A): Future[B] = {
-    // Cancel any ongoing computation
-    ongoingComputation.foreach { case (promise, _) =>
-      if (!promise.isCompleted) {
-        promise.failure(new CancellationException("Cancelled due to new input"))
-      }
-    }
-
-    val newPromise = Promise[B]()
-    val newComputation = Future {
-      api(input)
-    }
-
-    newComputation.onComplete {
-      case Success(result) =>
-        if (!newPromise.isCompleted) newPromise.success(result)
-      case Failure(e) =>
-        if (!newPromise.isCompleted) newPromise.failure(e)
-    }
-
-    ongoingComputation = Some((newPromise, newComputation))
-
-    newPromise.future
-  }
-}
-
-
diff --git a/app/src/main/scala/app/logorrr/views/block/BorderPaneChunkListView.scala b/app/src/main/scala/app/logorrr/views/block/ChunkListView.scala
similarity index 99%
rename from app/src/main/scala/app/logorrr/views/block/BorderPaneChunkListView.scala
rename to app/src/main/scala/app/logorrr/views/block/ChunkListView.scala
index 3add160c..443be15b 100644
--- a/app/src/main/scala/app/logorrr/views/block/BorderPaneChunkListView.scala
+++ b/app/src/main/scala/app/logorrr/views/block/ChunkListView.scala
@@ -8,7 +8,6 @@ import javafx.beans.property.{SimpleDoubleProperty, SimpleIntegerProperty}
 import javafx.beans.{InvalidationListener, Observable}
 import javafx.collections.{FXCollections, ObservableList}
 import javafx.scene.control.ListView
-import javafx.scene.layout.BorderPane
 
 import scala.util.{Failure, Success, Try}
 
diff --git a/app/src/main/scala/app/logorrr/views/logfiletab/LogFileTab.scala b/app/src/main/scala/app/logorrr/views/logfiletab/LogFileTab.scala
index 44fc63f1..6655de73 100644
--- a/app/src/main/scala/app/logorrr/views/logfiletab/LogFileTab.scala
+++ b/app/src/main/scala/app/logorrr/views/logfiletab/LogFileTab.scala
@@ -148,17 +148,8 @@ class LogFileTab(val pathAsString: String
 
   val repaintChunkListViewListener = JfxUtils.onNew[Number](n => {
     if (n.doubleValue() > 0.1) {
-      logTrace("divider")
       repaint()
     }
-    /*
-    throttler.process(n).onComplete {
-      case Success(_) => LogoRRRGlobals.setDividerPosition(pathAsString, n.doubleValue())
-      case Failure(_: CancellationException) => logTrace(s"Computation for $n was cancelled.")
-      case Failure(e) => logException(s"Error processing $n: $e", e)
-    }
-
-     */
   })
 
   def init(): Unit = {
diff --git a/app/src/main/scala/app/logorrr/views/menubar/FileMenu.scala b/app/src/main/scala/app/logorrr/views/menubar/FileMenu.scala
index e99fe376..310c1aee 100644
--- a/app/src/main/scala/app/logorrr/views/menubar/FileMenu.scala
+++ b/app/src/main/scala/app/logorrr/views/menubar/FileMenu.scala
@@ -1,11 +1,25 @@
 package app.logorrr.views.menubar
 
-import app.logorrr.util.{CanLog, LogoRRRFileChooser, OsUtil}
+ import app.logorrr.conf.LogoRRRGlobals
+import app.logorrr.util.{CanLog, OsUtil}
 import javafx.scene.control.{Menu, MenuItem}
-import javafx.stage.Window
+import javafx.stage.{FileChooser, Window}
 
 import java.nio.file.Path
 
+class LogoRRRFileChooser(title: String) {
+
+  def showAndWait(window: Window): Option[Path] = {
+    val fc = new FileChooser
+    fc.setTitle(title)
+    LogoRRRGlobals.getSomeLastUsedDirectory.foreach(d => fc.setInitialDirectory(d.toFile))
+    val somePath = Option(fc.showOpenDialog(window)).map(_.toPath)
+    LogoRRRGlobals.setSomeLastUsedDirectory(somePath.map(_.getParent))
+    LogoRRRGlobals.persist()
+    somePath
+  }
+
+}
 object FileMenu {
 
   class OpenMenuItem(getWindow: () => Window
diff --git a/core/src/main/scala/app/logorrr/io/Fs.scala b/core/src/main/scala/app/logorrr/io/Fs.scala
index 469bc355..2d6d3102 100644
--- a/core/src/main/scala/app/logorrr/io/Fs.scala
+++ b/core/src/main/scala/app/logorrr/io/Fs.scala
@@ -3,13 +3,16 @@ package app.logorrr.io
 import app.logorrr.util.CanLog
 
 import java.nio.charset.Charset
-import java.nio.file.{Files, Path}
+import java.nio.file.{Files, Path, Paths}
 
 /**
  * File related operations
  */
 object Fs extends CanLog {
 
+  /** compute file name from a LogFilePath */
+  def logFileName(pathAsString: String): String = Paths.get(pathAsString).getFileName.toString
+
   def createDirectories(path: Path): Unit = {
     if (Files.exists(path)) {
       logTrace(s"Using directory ${path.toAbsolutePath.toString}")