This is already there in the new user's registry and it is the same like in the old one, except the path of course. There is also pgptray.exe in start menu / all programs / startup, but this shortcut does nothing. Running the all programs / PGP corporation / PGP desktop does something but makes the error I posted above though... Not sure what is the difference between the shortcuts because they are defined in registry and you cannot see anything from their properties.
I wonder why this seamingly easy problem cannot be fixed by some standard way instead of this crazy hacking :-\
If you have no more ideas how to get past this error, then I guess the best way will be to boot from our recovery media with pgpwde, decrypt the drive from there, uninstall PGP and reinstall. Thanks for now