Dj
Yes I totaly agree with you, an upgrade or crossgrade option would be good, its just a matter of working out a mechanism to do it.
Maybe an easyer idea would simply be to offer a 'crossgrade' discount for JBP owners that want to move up to Videobox,
this way they get a discount for their loyalty, and they get to keep JBP on their computer (because its not an upgrade), leaving them free to install VBX on any other PC they wish to, what you think ?.