trashing the prefs won’t help but otherwise the plist is indeed the preference file and can safely be discarded.

… just to clarify, are the crashes solely on exit?

FYI EZplayer has some known issues with ‘Thru’ files which may be what you are running into. We are planning an update for it this week (in fact there will be a solo update more or less simultaneously) so I suggest waiting until it has been released to try to identify what part of the solo-ezplayer-S2 is responsible for the crashes. If problems persist then I’d suggest sending us sample crash logs so we can have a look.

Best Regards,
RM