Can't edit settings?

Having trouble with LMMS? Ask about it here.
Whenever I go into settings and hit "ok", it gives me an alert saying I must restart LMMS before changes are applied. However, if I quit and reopen LMMS, the changes are not applied, making it impossible for me to change the sound output from "dummy".
this sometimes happens if there has been a budged installation, or if a removal has been incorrect.
Search your USERDIR for the 'dot' file
.lmmsrc.xml
and move that to a different folder
Now you could try to start LMMS, and that would (i hope) go perfectly, but since you may have incomplete or bad installation on disk, i would run through a full de-install, delete the old install-pack, and download a fresh new 1.1.3
Then install
If it fails, then post again, but this time:
post your:
* OS
* lmms vers
* hardware specification (ram & soundcard is the most imortant)

NVM

Nevermind, I fixed it. I just had to change a setting in the main settings. BTW, before posting I reinstalled and the problem was not solved.
I just had to change a setting in the main settings
Curious : What exact setting was that?