Xoops supported versions You can use this new version on all the recent versions of Xoops 2.0. We did not tested the module with Xoops 2.2 but it should run.
How to upgrade Copy all the files to your site (and be sure to erase the old files), then go in the Xoops modules manager and upgrade the module. In case of troubles, consult the file UPGRADE.txt present in the module.