I am an Amplitube user (awesome software) and to the best of my knowledge the free is...free forever. Regarding the custom shop, you can buy anything you want but you must purchase credits. I think the minimum is 20 credits, while, effects and cabinet starts I think from 5 credits. I do not use to record but as modelling amplifier the software works well, very well, for me.
Carmine
PS can I add that IK Multimedia is an Italian company? :) Sometimes I am proud of the place where I was born, sometimes.
Regards,
cm