v1.3
Usage: download .zip files and unpack in any folder. Launch W3MayaAnimUtil.exe.
Drop W3AnimUtils_shelves.mel into Maya viewport to install my script shelves on current tab.
Video HowTo (demonstrates usage of the program, though a bit old): [Witcher 3][ANIMATIONS] HOWTO: Editing motionExtraction + retargeting in MAYA
Updates: added additives filter, CS multipart anim to "usual" splitted anims converter and vica versa (anims are extracted by name prefix).