OK, with the newest version I don't have segfaults.

However, I still can't log in without active nternet connection. If I try to launch QSpot without internet connection it always asks my login information, even if I have succesfully logged in previously and marked "remember my login information". When I enter my credentials I get notified that "Can't connect to Spotify". QSpot works fine (remembers my information and logs in automatically) when connecting with active internet connection.

This is what I did: uninstalled QSpot, deleted .qspot folder and subfolders, installed newest version from -devel with Fapman. I think some settings persisted even though I deleted the folder (when entering newly installed QSpot it was already in Offline mode [the button for this was highlighted] which was the state I left it when uninstalling it).