PartMaster V12, 13, 14 and later will only run Windows 7 , 8 and 10
Existing users only - Windows 10 - if you have upgraded your PC to Windows 10 and already have PartMaster installed you may find there is a problem when you try to Open or Save files. This is caused by the compatibilty settings that were applied when PartMaster was first installed. These compatibilty setting are not needed for Windows 10
If you encounter this problem, you will need to remove the compatibility settings for each app on your Desktop, to do this please the following.
Find each app on your Desktop and right click the mouse, from the options displayed choose Properties, then click the Compatibility tab, you will see this dialogue box
Uncheck the box "Run this program in compatibility mode"
Next, under the Privilege Level section, check the box "Run this program as an administrator"
Then click OK
Your app will now run without any problems.
This only applied to existing users, new users or new installations on Windows 10 will run without modification.