I dont know why but blender wont let me open .hdr files.
The weird thing is that I can open.exr files which are in the same folder.
Why I can open .exr files only? That makes no sense.
I can run blender as admin and it works again but that was never necessary and I want it to work like before.
The major changes on my system last months:
Added a new SSD ( D:\ ) where I put all my Blender Files like Textures and saves etc.( Blender still
installed on C:\ )
I upgraded to Win 10 Pro ( via “change Product Key” )