But when you installed Infinite, I think you got an INST code, I don't remember now, but I do know that I upgraded to Infinte from Vue5 Pro Studio, and I got to Pro Studio by buying the xtra modules just like you did. And I haven't had any problem registering Infinite. I think you should uninstall Infinite now, and re-install it, and see if you get an INST code at the end of the process, which I think happens. What I meant when I said you didn't need your INST code, is that you don't need it to contact Tech support, your Infinte serial is enough to fill out the form. Also, try the forums at E-on. Again no need for codes there.