If I understand correctly, you are looking to have a list of licensed users that can be first exported from the current setup (2.2) and then re-imported in the new upgraded set-up (3.2) - is that right?
I believe you have multiple options depending on how you are assigning the licenses and how you 'added' the users in 2.2 in the first place. There is no 'add user' in QS like it is in QV. So if you had used a typical LDAP or Excel list of users through the UDC , you can use the same and the new set up 3.2 will assign the licenses accordingly. Did it not work in your DEV/Test/QA environment?
If you are just trying to get a list of users so you can make a UDC and then the license monitor app can also provide a list.
Hope this helps,