Murphy, did you pull the safety release lanyard and hold it out when you raised the top off the safety bar? And, did the hydraulic pump actually work when you activated the lift switch? If the top DID lift off the bar, then it should lower if you pulled the safety bar out of the way.
There are several threads here about the location and appearance of the manual lowering valve, but I don't think that's your problem.
Hi-Lo 1707T - Tire Minder TPMS on Tow Vehicle and Trailer, 300W Solar Battery Charger, Equal-i-zer WDH
2014 F150 Platinum 4x4 3.5L EcoBoost SCrew