Which settings are you looking for? I assume you want to raise the bike back up to the stock height? Kinda hard to say without know what the guy did to lower it. Definitely you want to restore the original ride height, but unfortunately I don't think raising it back up is going to do anything at all to help your comfort. That stress on your wrists is a function of pegs to seat to bars geometry, height off the ground doesn't factor in. I'm taller too and do long days touring (8-10 hrs), so I focus on wrist strength, trying to keep my wrists flat while riding, and gripping the bike more with my knees and using my core. A throttle lock of some sort does wonders for being able to let go and flex/rotate your wrists.
If it's really a problem for you, look into some helibars, guys swear by them.