Upgrade to paid license..how?

[BirdOPrey5]

Originally Posted by Mark.B

No styles no practically no mods from 3.7 will work on 4.2.

Actually some very important mods do work across versions. Not "most" mind you but a fair number.

Basically any mod that has a front-end interface will not work, but mods that don't show up in the front end, such as those that check things during registration, those that prevent access to features based on post counts or usergroups, those that only work in the admincp, all work fine.

Here is a list of important 3.x mods that still work on 4.x with no 4.x native versions - https://vborg.vbsupport.ru/showthread.php?t=269719

[vuha89]

Originally Posted by Dave

You'll have to replace all of the vBulletin nulled files with the original files of a legal copy of vBulletin and then start the installation process with your customer number.
There's always a chance certain data or information will get lost, you never know if a nulled copy of vBulletin is broken or backdoored.

I also think like you

[benhungto]

why do not you backup your database and install the licensed forum and you connect your database to the new one?