After upgrading from Lion to Mountain Lion the existing installation in the folder "Incompatible software" is moved and can not move forward.
Countless advertising email before you will be forced to upgrade to PD 7 without that new features would be seen.
At the same time no mention of the incompatibility with ML and in the meantime even claimed on the website the opposite.
50, - for an upgrade are already fierce, if the product itself has not even tasted.
In addition, it must be assumed that PD 8 soon comes out and again 50, - will be due.
One reason for a forced upgrade seems this company so to find again and again without that the customer really has a value of it.
For me, the issue is settled and I to climb on VirtualBox.
Is free and for my purposes (occasional cranking of MS Office) absolutely enough.