diff --git a/build_with/doc/release.html b/build_with/doc/release.html
index cd644739..09acfa52 100644
--- a/build_with/doc/release.html
+++ b/build_with/doc/release.html
@@ -1,19 +1,4 @@
-<p>LizGoban 0.2.0-pre1</p>
-<p>Test version for developers.</p>
-<h3 id="to-use-lizgoban-leela-zero-katago-on-64bit-windows-immediately">To use LizGoban + Leela Zero / KataGo on 64bit Windows immediately</h3>
-<p>Just download the all-in-one package (LizGoban-0.2.0-pre1_win_*.zip), extract it, and double-click <code>LizGoban *.exe</code>. Its file size is due to the built-in engines:</p>
-<ul>
-<li><a href="https://github.com/leela-zero/leela-zero/releases/tag/v0.17">Leela Zero 0.17</a> (CPU-only) + <a href="https://github.com/leela-zero/leela-zero/issues/2192">15 blocks network</a> (a4b58a91) on 2019-11-10</li>
-<li><a href="https://github.com/lightvector/KataGo/releases/tag/v1.2">KataGo 1.2</a> (OpenCL) + <a href="https://github.com/lightvector/KataGo/releases/tag/v1.1">10 blocks network</a> (g104-b10c128) in v1.1</li>
-</ul>
-<p>You can switch them by [Preset] menu in LizGoban. Note that the first run of KataGo may take a long time (1 hour or more, for example) for its initial tuning.</p>
-<h3 id="to-use-lizgoban-with-gpu-mac-linux-etc.">To use LizGoban with GPU, Mac, Linux, etc.</h3>
-<p>Download the source code and see <code>README.md</code>.</p>
-<h3 id="major-changes-from-0.1.0">Major changes from 0.1.0</h3>
-<ul>
-<li>Enable quick switching of engines and weights.</li>
-<li>Add “personal exercise book”. (experimental)</li>
-<li>Improve komi and autoplay features.</li>
-</ul>
+<p>LizGoban 0.2.0-pre2</p>
+<p>In debugging. DO NOT USE THIS VERSION.</p>
 <h3 id="links">Links</h3>
 <p><a href="https://github.com/kaorahi/lizgoban">Project Home</a> / <a href="https://github.com/kaorahi/lizgoban/blob/master/LICENSE.txt">License (GPL3)</a></p>
diff --git a/build_with/doc/release.md b/build_with/doc/release.md
index e8cc8c32..787d9413 100644
--- a/build_with/doc/release.md
+++ b/build_with/doc/release.md
@@ -1,28 +1,8 @@
-LizGoban 0.2.0-pre1
+LizGoban 0.2.0-pre2
 
-Test version for developers.
-
-### To use LizGoban + Leela Zero / KataGo on 64bit Windows immediately
-
-Just download the all-in-one package (LizGoban-0.2.0-pre1_win_*.zip), extract it, and double-click `LizGoban *.exe`. Its file size is due to the built-in engines:
-
-* [Leela Zero 0.17](https://github.com/leela-zero/leela-zero/releases/tag/v0.17) (CPU-only) + [15 blocks network](https://github.com/leela-zero/leela-zero/issues/2192) (a4b58a91) on 2019-11-10
-* [KataGo 1.2](https://github.com/lightvector/KataGo/releases/tag/v1.2) (OpenCL) + [10 blocks network](https://github.com/lightvector/KataGo/releases/tag/v1.1) (g104-b10c128) in v1.1
-
-You can switch them by [Preset] menu in LizGoban. Note that the first run of KataGo may take a long time (1 hour or more, for example) for its initial tuning.
-
-### To use LizGoban with GPU, Mac, Linux, etc.
-
-Download the source code and see `README.md`.
-
-### Major changes from 0.1.0
-
-* Enable quick switching of engines and weights.
-* Add "personal exercise book". (experimental)
-* Improve komi and autoplay features.
+In debugging. DO NOT USE THIS VERSION.
 
 ### Links
 
 [Project Home](https://github.com/kaorahi/lizgoban) /
 [License (GPL3)](https://github.com/kaorahi/lizgoban/blob/master/LICENSE.txt)
-
diff --git a/package.json b/package.json
index 783a105a..2b00e3e2 100644
--- a/package.json
+++ b/package.json
@@ -1,6 +1,6 @@
 {
   "name": "LizGoban",
-  "version": "0.2.0-pre1",
+  "version": "0.2.0-pre2",
   "description": "An analysis tool of the game Go with Leela Zero and KataGo",
   "author": "kaorahi <khi@users.osdn.me>",
   "license": "GPL-3.0",