[Anime Viewer]

Looks like I was able to resolve my issue with the "Operation is not valid due to the current state of the object. (Mpdn.RenderScript)" error.

First I installed both the versions (x64 and x86) of MPDN that comes with an Installer (and Uninstaller), and then the Extensions that come with an Installer (and Uninstaller). Then I ran the uninstaller for the extensions first (deleting all settings), and then ran the uninstaller for MPDN (both versions) and selected the check boxes to remove extenisons and configurations. Next I installed MPDN (x64) from the installer with reset settings checked. Finally I installed the Extensions from the installer and checked for a clean install.

That got it where I could get into the options area and play videos again.

I found that if I change presenation API to anything other than Direct3D 9Ex (Direct3D 10.1 or Direct3D 11) then I would get the RenderScript error the next time I tried to open MPDN, and would be completely locked out again where I'd have to resort to uninstalling and reinstalling as detailed above to be able to get into MPDN again.

I also found that if I had full screen exclusive mode checked/enabled that the video would freeze (but audio still played) when I went to full screen.

I didn't have any problems prior to the latest Windows update using Direct3D 10 or 11, nor full screen exclusive mode, so it looks like whatever they implemented in their update broke both of those features.

I also have to uncheck Improve Chroma Reconstruction (which is checked by the default install settings) otherwise black, purple, indego, etc don't display correctly, but I don't believe that to be related to any of the other issues and it doesn't lead to an inability to play videos like the Direct3D and Full Screen Exclusive settings do now.

Now I just need to remember what settings (upscalers, downscalers, render scripts, etc) looked and worked best on my system...


Edit:
Looks like SuperRes doesn't work now.