Material definition is a blank white page

Hi Tiertime,
I recently installed Up Studio and then a few weeks later.
While all else is working perfectly I cannot get into the material editor. Clicking from within Upstudio-

It simply opens as a blank empty white window (see attached)
I have even tried opening the matdef.exe file directly with the same result, running it as “administrator”, installed latest video drivers etc.

laptop is a HP Elitedesk 8460p

Any suggestions on how to fix this would be greatly appreciated.

I ran into the same issue on my 8 year old Dell XPS. Been doing driver updates and everything on my 8 year old laptop like crazy. still cant get it to work. I finally gave up and bought a new computer