Before commencing any upgrade, make sure you have a full backup of your existing system, including a schematic backup of your current database. In the event of something going wrong, you can always revert your database back and try again.

View the changelog to see whats new.

Note that v2.1+ requires minimum v4 ioncube loaders.

Refer to the instructions in the following file:

docs/UPGRADES/readme.txt

Follow the instructions carefully. Any problems, please let me know.