When opening projects from previous versions in V12 the New Blue FX logo now appears in the video where transitions are placed making them unusable. Is there a fix?

As far as I know, everything is working fine. Did you install an upgrade? Perhaps going from and older version to version 3.0?

Maybe simply activating again would remove the watermark?

Thanks Edward. No changes other than installing V12. I re-opened V11 in both 32 and 64 bit and there are no watermarks, all of the NewBlue transitions have a watermark in V12.

OK figured it out. Updated the NewBlueFXpro titler and the watermarks went away.

Yes, if you're talking about the Starter Pack effects, you do need to make sure that you've updated Titler Pro to the current version.