I'll first note I'm using KSP 0.21.1 on Win 7 32-bit. I'm running 0.21-compatible versions of these mods - Chatter, Alarm Clock, Crew Manifest, and MechJeb. I added Lazor System to GameData, so the path is GameData\Romfarer\Romfarer.dll. First use, I got to the station view, and could see the Lazor tab in the upper left. Went to tracking station, picked the only vehicle I have, which is orbiting Kerbin, and made of only stock parts. Vehicle began to load - screen went black, with a camera view and time warp message on screen - and just hung. Had to pull up Task Mgr to stop the app. Second try, same thing. Pulled out the Romfarer folder, and everything loaded fine. Put the Romfarer folder back in, and same hang. Tried one more time, and somehow it worked. So I went back to the VAB. Saw that the Lazor parts were in the list. Loaded a vehicle I'd previously built out of stock parts, and everything went haywire. First, the vehicle was transparent and couldn't be selected. Second, the crew dialog was open, but nothing was in it. And three, the app crashed again. I'll continue to test, but so far, no joy.