There could certainly be many different reasons to this happening. I'm curious as to why the transparent areas are still transparent, but the non-transparent are all black.
Can you please try to find out if your CPU has integrated graphics? And if it does, in task manager, please check if GPU #0 or #1 is being used by GameTranslate_Desktop when running Desktop/Attached mode.
Also please do update your graphic's drivers and try to disable Automatic Color Enhancement.
- Select the Start button, then select Settings > System > Display > Color profile.
- Select your display near the top, then check for the following setting: Automatically manage color for apps.