Delete the app from your computer. That is the only way.
i've deleted folder "/users/username/Applications/Windows 7 Applications", but the problem is still there. That folder at the moment is inside Trash. Maybe if i empty trash everything is ok?
i've deleted folder "/users/username/Applications/Windows 7 Applications", but the problem is still there. That folder at the moment is inside Trash. Maybe if i empty trash everything is ok?

Delete the Application folder in the folder of your account name. This is where all parallels windows application shortcuts are.
Then
Finder>Go
~/Library/Application support/Dock
delete the .db file here.
Terminal> killall Dock
this worked for me...hope it helps
I tried using LaunchpadCleaner but the icons kept coming back. I found the best way to permanently get rid of them was to do a Spotlght search. Search based on version and put in "Windows" (see screenshot below). Select all of them and move it to trash.