@pinterf,
I can't get your fork to work:
https://github.com/pinterf/AviSynthPlus/releases (x86).
I copied your dll over the regular avisynth+ version (AviSynthPlus-r1576.exe). The regular version works fine, but when overwriting it by your dll i get 'AVI Import Filter error' when opening Version.avs in 32-bit Virtualdub (Win7).
edit: Guess i needed Microsoft Visual C++ 2015 Redistributable.