Yup. Just that folder.
You can also use RoboForm own Backup feature.
RoboForm menu -> Options -> User Data (on left list) -> Backup button (under Backup and Restore).
It will inform you of what is going to be backed up. It's essentially the contents of your current RoboForm profile folder. By default it is under My RoboForm data. This folder contains all your current profiles.
So the backup feature only backups the current profile you have activated under RoboForm menu -> Profiles. If you have more than one profile, best indeed to manually copy the My RoboForm Data folder.