probably not - unless you could prove that it was a breach of the EULA - which I don't know if it can be classed as a compatition product against Poser4 - though in essence it could be... After all - they have taken poser 4 and placed it all in a product which is to compete against Poser 4... I know a stretch :P But I have been stretching in places against Poser5 - so I should be able to stretch in my support for Poser 4 :) lol i can kinda understand one of the EULA statements now in Poser 5 :) and why it was put in there :)