Emanuel,
Have you got these menu options in your popup menu? If no, you've certainly found the point: digging on C:\ disk of the computer without QTTabBar, I just found an old QTTabBar folder... I should have probably install this one day, uninstall it later and forget about it. The uninstall process has probably left some waste in the folder' system popup menu.
Anyway, these 2 options would have been cool to have in OC. Milos, do you plan to add them?