Look into the backup tar file at /vmail/temp/db/backup/backup.dsc, there is the Software Version. My backup was made on CXi running on MCD SP2 PR2, I'm not sure if it is the same for the LX controller.
Backup Filename=Ipera3k
Software Version=11.0.2.66
TimeStamp=201305241000.02
Location=/vmail/temp/db/backup
Type=Full Online
Option=Backup Call History Records,iPVM Full Backup,
Memory Size=512
Configurable Users=700
Data Model=GDM
Petr