Why VSGAN is not supported,...

[Selur]

Yes, if everything was

yes.

Hybrid will on start-up look what extensions&co are available and then list then in the log tab.
I for example see:

Detected NVIDIA PureVideo compatible cards: NVIDIA GeForce RTX 4080
Detected vfwDecoders with 32bit:   VIDC.LAGS   VIDC.WMV3   vidc.cvid   vidc.i420   vidc.iyuv   vidc.mrle   vidc.msvc   vidc.uyvy   vidc.yuy2   vidc.yvu9   vidc.yvyu
Detected vfw64BitDecoders:   VIDC.LAGS   VIDC.WMV3   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,..
    vsGMFSS fortuna available,..
    vsBasicVSR++ available,..
    vsRealESRGAN available,..
    vsSwinIR available,..
    vsHINet available,..
    vsAnimeSR available,..
    vsFeMaSR available,..
    vsSCUNet available,..
    vsCodeFormer available,..
    vsGRLIR available,..
    VSMLRT available,..
    vsRIFE (mlrt) available,..
    vsDPIR (mlrt) available,..
Finished startup, finished after 11.494s

Okay, I just checked the code, Hybrid will only show vsgan if the model folder is available:

QString vsgan = StaticHelper::relativeToAbsolutePath("./64bit/vsgan_models");
      m_optionalAvailableFilters.insert(QString("VSGAN"), FileHelper::existFolder(vsgan));
      QString vsdpir = StaticHelper::relativeToAbsolutePath("./64bit/Vapoursynth/Lib/site-packages/vsdpir");
      m_optionalAvailableFilters.insert(QString("VSDPIR"), FileHelper::existFolder(vsdpir));
      QString torchRife = StaticHelper::relativeToAbsolutePath("./64bit/Vapoursynth/Lib/site-packages/vsrife");
      m_optionalAvailableFilters.insert(QString("VSTORCHRIFE"), FileHelper::existFolder(torchRife));
      QString gmfssfortuna = StaticHelper::relativeToAbsolutePath("./64bit/Vapoursynth/Lib/site-packages/vsgmfss_fortuna");
      m_optionalAvailableFilters.insert(QString("VSGMFSSFORTUNA"), FileHelper::existFolder(gmfssfortuna));
      QString realsrgan = StaticHelper::relativeToAbsolutePath("./64bit/Vapoursynth/Lib/site-packages/vsrealesrgan");
      m_optionalAvailableFilters.insert(QString("VSREALESRGAN"), FileHelper::existFolder(realsrgan));
      QString basicvsrpp = StaticHelper::relativeToAbsolutePath("./64bit/Vapoursynth/Lib/site-packages/vsbasicvsrpp");
      m_optionalAvailableFilters.insert(QString("VSBASICVSRPP"), FileHelper::existFolder(basicvsrpp));
      QString vsswinir = StaticHelper::relativeToAbsolutePath("./64bit/Vapoursynth/Lib/site-packages/vsswinir");
      m_optionalAvailableFilters.insert(QString("VSSWINIR"), FileHelper::existFolder(vsswinir));
      QString vshinet = StaticHelper::relativeToAbsolutePath("./64bit/Vapoursynth/Lib/site-packages/vshinet");
      m_optionalAvailableFilters.insert(QString("VSHINET"), FileHelper::existFolder(vshinet));
      QString ansimesr = StaticHelper::relativeToAbsolutePath("./64bit/Vapoursynth/Lib/site-packages/vsanimesr");
      m_optionalAvailableFilters.insert(QString("VSANIMESR"), FileHelper::existFolder(ansimesr));
      QString femasr = StaticHelper::relativeToAbsolutePath("./64bit/Vapoursynth/Lib/site-packages/vsfemasr");
      m_optionalAvailableFilters.insert(QString("VSFEMASR"), FileHelper::existFolder(femasr));
      QString scunet = StaticHelper::relativeToAbsolutePath("./64bit/Vapoursynth/Lib/site-packages/vsscunet");
      m_optionalAvailableFilters.insert(QString("VSSCUNET"), FileHelper::existFolder(scunet));
      QString vscodeformer = StaticHelper::relativeToAbsolutePath("./64bit/Vapoursynth/Lib/site-packages/vscodeformer");
      m_optionalAvailableFilters.insert(QString("VSCODEFORMER"), FileHelper::existFolder(vscodeformer));
      m_optionalAvailableFilters.insert(QString("VSREALCUGAN"), true);
      QString vsgrlir = StaticHelper::relativeToAbsolutePath("./64bit/Vapoursynth/Lib/site-packages/vsgrlir");
      m_optionalAvailableFilters.insert(QString("VSGRLIR"), FileHelper::existFolder(vsgrlir));
    QString vsmlrt = StaticHelper::relativeToAbsolutePath("./64bit/vs-mlrt");
    m_optionalAvailableFilters.insert(QString("VSMLRT"), FileHelper::existFolder(vsmlrt));

=> what does it show in your Log-tab after starting?

Cu Selur

Ps.:
Like I wrote before:

That said, I have torch&mlrt addons for Hybrid nowadays, see: https://forum.selur.net/thread-2820.html
(drop a post there, that you also would like the addons and I'll send you my current links via pm after work)