One have to have "root" privileges to install VTune only.
My guess that the root ownership/permissions in your $HOME directory files were as a result as "su" and not "su -" to root. And then run VTune. "su" does not run login scripts so likely the $HOME was left from the user that did "su". The "Default" place where VTune stores it's files is $HOME/.VTune.
BTW I recommend to use $VTUNE_USER_DIR to redirect this place to more suitable place, as well to make it "local" (in case you home dir is on nfs or afs or any other network drive). You can also create projects, using $VTUNE_USER_DIR