You have to move the license.ini file to the “config” folder.
If it’s still not recognized, the license information for v2.2 might be missing. You can verify this by opening license.ini in Notepad. It should have a section named “[Version 2]” or “[Version 2.1]”. If it has not, let the license system send you an updated license.ini: http://www.mairlist.com/en/license/mail.php