Hi Adam. The only way to mass delete tracks in PlayIt Manager is to delete the database. This is found at: C:\ProgramData\PlayIt Manager\playit.db
You can essentially back up your system and wipe it by renaming your playit.db to playitbackup.db. Then rename your AudioStore folder to AudioStoreBackup. You have to delete your AudioStore folder if you want to clear off all your audio files to free up disk space.
Is there any way to bulk delete files in PlayIt Manager?