Im planing to buy the Liscence of vbulletin, but i have some questions. I have an unlescinced forum, when i buy the liscenced, i wiill be able to upgrade the unlescicnewd version or i will have to install a new one and clear de data base to fit the new forum.

i think, that you must replace all nulled files, but you can ask in vb.com pre-sales forum.

You have to replace all the nulled files.

I also bought Vbulletin and they said all files have to have the license number.

You only need to by license for using vbulletin. Thats all.
You can continue to use nulled scripts. It's not them business at all =\

Thanks foir the answer, now im going to buy it with out fear eaea. So i will be able to help in the hack request.