warning dialog for unsupported groove.exe versions at start and before the first apply of a session (nothing blocked)

CHANGELOG.md

@@ -4,7 +4,8 @@
 
 - **English game version supported.** All exe mods (boot to level, cheats, intro skip, practice
   tools, free camera) and the base patch now also work with the English groove.exe of
-  2000-10-17; other unknown versions still stop with a clear message.
+  2000-10-17. With any other version LlamaMod warns at start and before the first Apply (nothing
+  is blocked); mods that change groove.exe then stop with a clear message.
 - **Display diagnostics option renamed and explained.** The cheats option is now called
   "Troubleshooting: write display diagnostics" and warns that the game switches through every
   screen mode of every monitor at start (screens go black for a while). It stays off by default.