After upgrading to the newest Version we are no longer able to open the history of GPO objects.
When trying to open the history of an object the console freezes and after a dew seconds just crashes.
This is currently a known issue that will be corrected in the next release of GPOADmin which is due to be released before the end of the year.
The defect ID for this issue is 517579
Workaround:

The History of the GPOs can be verified using the GPO Management view on GPMC.
If you need to perform a rollback/ Get version, this option can be used.