This is a quick and dirty tool to scrub rigs of non-exportable data, allowing for FBXs to better represent rigs and animations as they are imported into Unity or Unreal.
Unzip the entire febex folder into something that is in your maya path. If you'd rather put it somewhere else, you can path it like so:
import sys
# The path where the febex folder is (change \ to /!)
sys.path.append("install folder of febex")
Just make sure the folder where the code lives is called "febex" (If not, account for that in upcoming steps).
Put the following in a script editor or shelf button-- this will work if the febex folder is pathed correctly (see above).
import febex.ui as fb
ui = fb.Febex_Ui()
This UI won't recall the lists of influences it just made if you close and re-open it, so try to perform all your operations with the window remaining open. You may have to reload your file after you've run a procedure on it.