Nothing to worry about. The old SteamVR input API only really supported Vive wands, they deprecated it a while ago in favor of their new, more flexible VRInput() system. Hence the part of vorpX that used the old API had to be rewritten to allow full Index controller support.
I did the wrestling with the SteamVR mapping, the only changes you will notice are for the better, i.e. support for more controller types. You can still map the controllers in vorpX like before. Also all existing setups still work and are fully interchangeable between controller types as far as possible.