One simple question, if i download and install a vb suite license on my site and then in license area, update a vb 3 forum license in edit license then will vbulletin able to find if i am using vb3 licence on vb4 suite?
In Members Area, you need to provide the Forum URL where you are going to install the vbulletin script. So they can know which version is running.
There is a call back in the script, they will find you if they want. You can use a vb3 license if you have an active vb4 license. You may only run one install per license.