We have a stand alone shower, tumbled travertine tile, drain clogged, two screws removed from screen but unable to take screen off, seems as if grouted in?? How do we take it off?

Once the screws are removed the strainer grid just pops up and off as you suspected, I'm sure!

You may need to use a screwdriver through one of the holes and pry up on the strainer grid... it should pop up eventually!

MARK