My only suggestion would be to delete your old LW Preferences folder. But this should only be done whilst LW is CLOSED. Instructions here Deleting LW Preferences folder in OSX

However before you do that, it might be wise to make a note of all your settings. After deleting the LW prefs folder, next time you open LW you will need to reset all options again.

(You might wish to back up these files library5.dat, downloads.dat, library.dat however, they themselves might be responsible for the problems. But if you did, drop these back into the LW prefs folder after you open & then close the program after having deleted the prefs folder.)