Please upgrade to 2.1.x here.
The 2.0 branch is no longer being updated.
We would like to integrate vanilla forum as a community forum on our startup. During integration we will be connecting our user accounts to vanilla, which means we will need to modify the registration scripts slightly. This version will never be redistributed or for sale. It is only to be used for us and our community.
Can we modify the vanilla forum and still use it on our server ? without it affecting our software licence? or once we modify vanilla our proprietary software needs to be GPL too?