Welcome to our community, Steph
Surely you are meaning X3, no?
One of the main considerations is to ensure that RoboHelp is
fully patched before you attempt to upgrade or open any projects
you were working on. There are two patches for RoboHelp. You will
want to click Help > Updates (may be check for updates - not
sure as it isn't in front of me at the moment)
Backups are also nice.
Cheers... Rick