Cannot change Data Grids Visual Active Style

Just downloaded the new version of Toad 12.6, cannot change the Active Style to Windows Classic or to any other Active Style. I’ve tried to go to Toad Options > Data Grids > Visual > Active Style selected Windows Classic and clicked Apply and closed. The Active Style, Windows Classic did not apply to Toad, I also tried to exit Toad and restart Toad, still no changes. Could someone help!

All, my problem has been resolved. Thanks!