Revo is your best bet - it has an option to do a deep scan in the registry to remove an application completely.
You can find the user guide below -
Revo Uninstaller - User's Guide Just and edit here -
I ran the 'Myst 5 Failed Installation' info, but when I got to the part that said 'Browse windows folder for a file named 'vpd properties' I got a message that said " This file does not have a program associated with it for performing this action. Please install a program or, if one is already installed, create an association in the Default Programs Control Panel,"
It almost sounds as if you "left" clicked the VPD Properties file, which would explain the message. In the threads I've reviewed, they've all stated to "delete" the file. To do that one, you need to "right" click it, and select "delete", which sends it to the recycle bin.