it's easy to upgrade, follow the instructions, but if you have any issues post in the appropriate board

i've pm'd the download url & login details

The latest release is now only available by request here on this thread, so register/login and get a copy.
Still free & open source.

You only need to ask for a copy, that is all, however some info like: Country, Board URL
& any other details you want to share about your Forum are most welcome.

I can now provide changelogs for any version to version upgrade just tell me which you plan on upgrading from/to
e.g. 
upgrade 2.6.12 to 3.3 or 
2.6.0 to 3.1, etc.

Current release is 3.3