Do  a google search for Evilinnocence's Crossdresser.  It's free and supports many figures.   You only pay for the license of the figure you want to convert TO and not FROM.  There are several free licenses too so you can try it out first.   It's fast, comes with a variety of options and is usually reliable.   The Fitting room needs a lot of adjustments IMO that I have yet to fully understand.   Usually the clothes just shrinkwrap for me and look nothing like the original, may be good for tight-fitting items but not for everything with my mediocre skills.