You don't really need a converter because the Xsorbit X5 is an older version of SMF. All you need is a backup of your SQL data and structure. Import that to you new location, download the upgrade package and FTP it to your host then follow the directions on doing an upgrade.
The only problem I had was the upgrade package doesn't have a settings file, so I downloaded the full version, FTPed the settings file, ran repair_settings and it worked.
Good luck.