The IDE started to freeze on startup. It turned out that I had cleaned up my AppData/Local/Temp directory, where IDE stored some temporary files. The solution was to remove the HKEY_CURRENT_USER\Software\JavaSoft\Prefs\org\sikuli\ide\/I/D/E_/S/E/S/S/I/O/N (IDE_SESSION) value.
The IDE started to freeze on startup. It turned out that I had cleaned up my AppData/Local/Temp directory, where IDE stored some temporary files. The solution was to remove the HKEY_CURRENT_ USER\Software\ JavaSoft\ Prefs\org\ sikuli\ ide\/I/ D/E_/S/ E/S/S/I/ O/N (IDE_SESSION) value.
rc2 does not have this bug.
Big thanks for the Sikuli itself!