Was trying it just for fun - my needs are modest - and when i had added amplitube as a plug in I was told I had some days use but needed to register/activate etc and then I was offered an updated version at which time I hit cancel.

Can I use the old version (which is what PG Music has licensed I presume) without further ado?

Maybe the plug in appears automatically in BIAB as the parent program but I haven't tried it