Missing sounds?

i just plugged my A4 in again after quite a few months of no use. i upgraded to the new OS also a while ago when i upgraded the rytm btw. but for some reason i cannot fathom, i cannot hear around half of my sounds.??? its as if they have disappeared. does anyone have any idea how this could be?
thanks in advance

Can you hear “disappeared” sounds directly from +Drive? Try to reload “corrupted” kits.