Hi Matt,
not sure if you read the comments, but just fyi: it seems that it would now be possible to update to the newer Blender versions. There is the new 'EXACT' solver, that should be similar to the old 'CARVE' solver. I think from v2.91 upward.
I tried to update the addon and got pretty far, but I don't really understand the new Depsgraph stuff, so for now I gave up.
Cheers
Jan