Download and install the latest AviSynth+ (with vcredist)
https://github.com/AviSynth/AviSynthPlus/releases
Download the latest MvTools
https://github.com/pinterf/mvtools/releases
Extract x64
from the archive (DePan.dll, DePanEstimate.dll, mvtools2.dll) to C:\Program Files (x86)\AviSynth+\plugins64\
(adjust the avs script if avisynth is not installed in this directory)