diff --git a/AUTHORS.md b/AUTHORS.md
index 114dbb45..f6faf058 100644
--- a/AUTHORS.md
+++ b/AUTHORS.md
@@ -11,8 +11,8 @@ Main Authors
     * macOS package maintainer
 * [Shlomi Fish](https://www.shlomifish.org/)
     * Continued PySolFC maintenance, port to python 3, test suite (Note: he places all his changes under the Expat licence).
-* https://github.com/lufebe16
-    * Added the Kivy toolkit
+* [lufebe16](https://github.com/lufebe16)
+    * Added the Kivy toolkit and all the Android app related code and build procedures.
 * [Roderik Ploszek](https://github.com/Programator2)
     * Fixes and enhancements
 * [Joe R.](https://github.com/joeraz)
diff --git a/buildozer/aversion b/buildozer/aversion
index 9bd7c484..de5b51e2 100755
--- a/buildozer/aversion
+++ b/buildozer/aversion
@@ -9,7 +9,7 @@ else
 fi
 
 # current android version mumber.
-version="3.0.0"
+version="3.1.0"
 sversion=$(echo $version  | sed -E "s:(.*)\..*:\1:")
 tuple=$(echo $version | sed -E "s:(.*)\.(.*)\.(.*):(\1, \2, \3):")
 
diff --git a/buildozer/pubspec.json b/buildozer/pubspec.json
index 3ea821ec..bbabe20d 100644
--- a/buildozer/pubspec.json
+++ b/buildozer/pubspec.json
@@ -11,10 +11,10 @@
       "type": "SINGLE",
       "filters": [],
       "attributes": [],
-      "versionCode": 102130000,
-      "versionName": "3.0.0",
+      "versionCode": 102130100,
+      "versionName": "3.1.0",
       "outputFile": "pysolfc-release.apk"
     }
   ],
   "elementType": "File"
-}
+}
\ No newline at end of file
diff --git a/fastlane/metadata/android/en-US/changelogs/102130100.txt b/fastlane/metadata/android/en-US/changelogs/102130100.txt
new file mode 100644
index 00000000..05ea2f91
--- /dev/null
+++ b/fastlane/metadata/android/en-US/changelogs/102130100.txt
@@ -0,0 +1,3 @@
+- some new games (see under games/by-pysol-version)
+- bugfixes.
+- consult NEWS.asscidoc or html-src/news.html on the github repo and https://pysolfc.sourceforge.io for more informations.
diff --git a/html-src/credits.html b/html-src/credits.html
index 3077b4c3..a6d993f9 100644
--- a/html-src/credits.html
+++ b/html-src/credits.html
@@ -6,7 +6,7 @@
 <li><a href="https://sourceforge.net/u/skomoroh/profile/">Skomoroh</a> - Author of PySolFC</li>
 <li><a href="https://sourceforge.net/u/brianl/profile/">Brian Lenihan</a> - MacOS package maintainer</li>
 <li><a href="https://www.shlomifish.org/">Shlomi Fish</a> - Continued PySolFC maintenance, port to python 3, test suite (Note: he places all his changes under the Expat licence).</li>
-<li><a href="https://github.com/lufebe16">https://github.com/lufebe16</a> - Added the Kivy toolkit</li>
+<li><a href="https://github.com/lufebe16">lufebe16</a> - Added the Kivy toolkit and all the Android app related code and build procedures.</li>
 <li><a href="https://github.com/Programator2">Roderik Ploszek</a> - Fixes and enhancements</li>
 <li><a href="https://github.com/joeraz">Joe R.</a> - Many new games and continued PySolFC maintenance and development.</li>
 </ul>
@@ -36,4 +36,4 @@
 </ul>
 <p>
 <a href="credits_old.html">View original PySol credits</a>
-</p>
\ No newline at end of file
+</p>
diff --git a/locale/de/LC_MESSAGES/pysol.mo b/locale/de/LC_MESSAGES/pysol.mo
index 1a3d5973..cfc17ba1 100644
Binary files a/locale/de/LC_MESSAGES/pysol.mo and b/locale/de/LC_MESSAGES/pysol.mo differ
diff --git a/locale/fr/LC_MESSAGES/pysol.mo b/locale/fr/LC_MESSAGES/pysol.mo
index 0e380b68..6b269da7 100644
Binary files a/locale/fr/LC_MESSAGES/pysol.mo and b/locale/fr/LC_MESSAGES/pysol.mo differ
diff --git a/locale/it/LC_MESSAGES/pysol.mo b/locale/it/LC_MESSAGES/pysol.mo
index 6e8f1ed3..a987222c 100644
Binary files a/locale/it/LC_MESSAGES/pysol.mo and b/locale/it/LC_MESSAGES/pysol.mo differ
diff --git a/locale/pl/LC_MESSAGES/pysol.mo b/locale/pl/LC_MESSAGES/pysol.mo
index 5cc81db5..8e445a03 100644
Binary files a/locale/pl/LC_MESSAGES/pysol.mo and b/locale/pl/LC_MESSAGES/pysol.mo differ
diff --git a/locale/pt_BR/LC_MESSAGES/pysol.mo b/locale/pt_BR/LC_MESSAGES/pysol.mo
index f9bfb0e3..f9dd965f 100644
Binary files a/locale/pt_BR/LC_MESSAGES/pysol.mo and b/locale/pt_BR/LC_MESSAGES/pysol.mo differ
diff --git a/locale/ru/LC_MESSAGES/pysol.mo b/locale/ru/LC_MESSAGES/pysol.mo
index 88137f0c..ec2e65b9 100644
Binary files a/locale/ru/LC_MESSAGES/pysol.mo and b/locale/ru/LC_MESSAGES/pysol.mo differ
diff --git a/pysollib/kivy/LApp.py b/pysollib/kivy/LApp.py
index 5a3926eb..4c94dd35 100644
--- a/pysollib/kivy/LApp.py
+++ b/pysollib/kivy/LApp.py
@@ -1401,6 +1401,11 @@ class LWorkWindow(Widget):
         # return True
 
 # =============================================================================
+# TkBase:
+# When using (introducing) new methods of the main tk window in the tk-version
+# please check if that method is catched here. And provide appropriate
+# implementation if needed. Otherwise the android version will crash.
+# LB241029.
 
 
 class LTkBase:
@@ -1564,6 +1569,9 @@ class LTkBase:
         return True
         # ???
 
+    def attributes(self, *args):
+        pass
+
 # =============================================================================