I tried by mistake to load a XGM Database in XMM. That XMM now tried to convert the "old" database and hanged. I had to change the database in the config.ini of XMM, because it saved the wrong database and hanged on every start. And the Database from XGM was corrupted so i couldn't start XGM anymore. I had to delete that Database...
And the Layout of XMM was totally messed up, i had to reload my layout.