Hey guys sorry for the late reply I was busy all month, and haven't been on the forums. To install the program, download the files from the Git, then move the zivaUI folder into any of your maya script paths. IE. C:\Users(username)\Documents\maya\scripts. Once you got that running to create the save and load weights scripts use this command:
(for save and load weights)
from zivaUI import ZivaSaveandLoadWeights
(for ziva prune weights)
from zivaUI import ZivaPrune
Hopefully this was useful, and if you guys have any other questions feel free to skype me at kzchiang Have a good one!