3.3

New: IGDB as default cover image source #334 #311
New: Slovak localization (thanks to sekuka925) #329
New: Brazilian Portuguese localization (thanks to RubeensVinicius) #330
Fix: Unable to re-open game database when opening fails once
Fix: Prevent database file from being opened by multiple processes
Fix: Possible crash when downloading metadata for large libraries
Fix: Play Action changes not being saved #344
Fix: Missing localization strings #346
Fix: Game can be started by accident when double clicking #332
Fix: Filters stop working after canceling from Settings menu
Fix: Editing game category cannot be cancelled