Taken from the pissed off thread:
I had a bit of time between jobs and got it to work! Turns out Live 12 has a regular folder browser option which I found by accident. Moved my old Live library there and moved some ams files and told it where to look aaaaaaand it works! Even got some old presets and sample packs back. Gonna try to make a tune before “family fun time” begins tomorrow (Thanksgiving…..)