Hi Steve, welcome! First things first, unless you know what you're doing, please resist the urge to touch it.
There's no reason why a properly adjusted trem should "click" when used. It's possible the knife edge has popped out of the recess in the trem screws.
Are you adept at setting up guitars? If not, take it to a luthier and have them check it over. The main thing with PRS trems is making sure all the spring/string tension is relieved before making any adjustments.
There's setup guides and videos online if you're handy with tools/ruler/gap gauges. Good luck, Justin