Get it at:
https://carlosedubarreto.gumroad.com/l/ceb_easymocap_blender
To do the finger tracking, you must download the SMPLX model.
Go to download and get this file

Open it and extract this file

import on the addon using this option

To export the finger motion you have to choose the options below, available since version 0.16

Then, in Mocap_Import you dont have to do anything different.