I just found some other database remove bug. If you mark a database and press ENTF a dialog will appear and ask you if "you are sure to remove the following databases". Pressing OK will crash SQLiteStudio. The database will be removed from the list anyways. Declining it works as expected. The database itself (SQLite3) is stored on a network drive.
edit: The crash also occurs with local stored databases (for example on my desktop).
Besides that: Is there some issue with SQLite2 files stored on network drives? If I try to add one, the Status field at the bottom throws the following error message:
[16:50:04] Could not add database Z:/name/inc/db/test.sqlite:
Let's go the easy way and choose SQLite!