GM8 & GM8.1 are actually different programs/exes/installations - they're separate, they have their own folders.
When you update from GM8 to 8.1 it doesn't update or overwrite GM8...
so ya can have both on your machine
As manuel777 says: if ya have your purchase reference number (16 digits) & follow the instructions on the glog, then ya can get a new serial number for GM8.1 (36 digits) for free.
(Or ya can pay for a new serial if ya feel generous & really want to).
Not sure if having used a crack for GM8 would interfere with the process tho.
Edited by dadio, 20 April 2011 - 09:25 AM.