How to re enable update for BEX 2010 After skip Update of Backup Exec 2012

Hi,

I was skipped update of BEX 2012 in live update because it is not planned.

but now I am planning to update backup exec 2010 R3 to 2012 using liveupdate it is not showing Update of BEX 2012.

Please help me to re enable it.

Or If I use Media to upgrade BEX 2010 to 2012 is it required to upgrade my old licenses which are 2012?

Thanks.