Se eu entendi a pergunta corretamente, isso pode ajudar:
Upgrade Parallels to the latest 5626 build via the "Check for updates" option under the "Parallels Desktop "Help" menu.
Turn on SmartSelect in the Shared Applications options in Configuration Editor and start Windows.
Go to the Applications menu and choose the "SmartSelect - Set to default" menu option to recreate file associations.
After that click one of the buttons ("Only for this VM" or "For all VMs").