If I remember correctly, you just place your new camera profiles into the Programdata\ddisoftware\ Qimage\Profiles folder.
Rename or delete the old ones, but make sure you name the new ones exactly or they will be ignored.
Thanks Fred, but that doesn't solve my problem. Since the installer of Qimage contains the wrong profiles it will overwrite my new profiles with the old ones. So I have to copy the new profiles to the mentioned folder with every Qimage update.