Why VSGAN is not supported,...

[ld57]

here the log show on my side

Detected NVIDIA PureVideo compatible cards: NVIDIA GeForce RTX 4090
Detected vfwDecoders with 32bit:   vidc.cvid   vidc.i420   vidc.iyuv   vidc.mrle   vidc.msvc   vidc.uyvy   vidc.yuy2   vidc.yvu9   vidc.yvyu
Detected vfw64BitDecoders:   vidc.cvid   vidc.i420   vidc.iyuv   vidc.mrle   vidc.msvc   vidc.uyvy   vidc.yuy2   vidc.yvu9   vidc.yvyu
   Avisynth+ is available,..
    DGDecNV available,..
   Vapoursynth is available,..
    DGDecNV available,..
    vsDPIR available,..
    vsRIFE (torch) available,..
    vsBasicVSR++ available,..
    vsRealESRGAN available,..
    vsSwinIR available,..
    vsHINet available,..
    vsAnimeSR available,..
    vsFeMaSR available,..
    vsSCUNet available,..
Current defaultOutputPath: is empty!
-> Set it under Config->Path
Current defaultTempPath: is empty!
-> Set it under Config->Path
Finished startup, finished after 10.648s

I move now vsgan_models to "./64bit/vsgan_models"

and here the log , VSGAN is detected

Detected NVIDIA PureVideo compatible cards: NVIDIA GeForce RTX 4090
Detected vfwDecoders with 32bit:   vidc.cvid   vidc.i420   vidc.iyuv   vidc.mrle   vidc.msvc   vidc.uyvy   vidc.yuy2   vidc.yvu9   vidc.yvyu
Detected vfw64BitDecoders:   vidc.cvid   vidc.i420   vidc.iyuv   vidc.mrle   vidc.msvc   vidc.uyvy   vidc.yuy2   vidc.yvu9   vidc.yvyu
   Avisynth+ is available,..
    DGDecNV available,..
   Vapoursynth is available,..
    DGDecNV available,..
    VSGAN available,..
    vsDPIR available,..
    vsRIFE (torch) available,..
    vsBasicVSR++ available,..
    vsRealESRGAN available,..
    vsSwinIR available,..
    vsHINet available,..
    vsAnimeSR available,..
    vsFeMaSR available,..
    vsSCUNet available,..
Current defaultOutputPath: is empty!
-> Set it under Config->Path
Current defaultTempPath: is empty!
-> Set it under Config->Path
Finished startup, finished after 10.625s

yay VSGAN is present 
i update the procedure on my side