deleting the file doesn't work. I installed the 1.2 version but seems that there is a problem with the resolution because everything is bigger than my screen. How can i manage it?

Hello everyone, unfortunatly i changed the Audio Settings into Dummy (no sound output) and the midi settings into Dummy (no midi support) . Now I'm trying to restore alsa and alsa-raw midi but as soon as I restart Lmms and the Audio Settings window, Dummy is still there. I've already tried to reinst...