well i stand to be corrected i did get a reply from mtu about the upgrade:
so now i have to shop for another writer as well as upgrade my program! argh!
The latest response to your ticket was:
You will need to purchase the Version 4.22 upgrade to install it again, as the version you have is ancient and no longer supported. Also your old Plextor 48x drive will not work with the newer software as it is also to old to be used with the new stuff.
You can get the upgrade from here
http://www.mtu.com/upgrades/microstudio.htm