hmmm… just lost my entire engine os 421 database… it seems engine no longer knows about my hd with all my music… win11 still shows it 'n says its there [no errors], so does engine if i look at the folder tab on the left… but my collection now says 0 tracks… i tried restoring from a backup a week ago [ive made no changes since] but it also says 0 tracks… looks like i need to rebuild the db - all files still exist on my ext hd, as does the collection structure ie smart folders n playlists… they are just all empty.