Started my free 30 day trial of pro a couple days back but I noticed in my builds it has a watermark that says trial version in the lower right corner. I am making a game for an fbla contest (no commercial use what so ever) and was wondering if there is a way to get rid of this as I fear I might be docked. Also this is not the splash screen, I'm not worried about that. Any tips would be appriciated.

There's no way to turn it off; that would defeat the purpose. The trial mode is for evaluation only, no other uses.

As Eric5h5 said, you can't turn it off in trial, but I suppose the easiest option would be to just publish with the free version, assuming you don't want the lighting/water goodies in pro that'd be most obvious from the player's side of things.

Kind of a burningly obvious answer, so you probably DO want those things. Just in case you were somehow unaware, though :P.