Hello Rand. Black Glass program works appropriately with only those themes those having a black/dark explorer background. It has the ability to make some other program windows transparent, too; only when the program window backgrounds are black.
But it you have black glass enabled with a non-black theme, you will face a situation as in the uploaded picture, hazy and non prominent text. What I have said, it is for black themes only.
When you are applying a non black theme back, you need to stop black glass. Enhance the system trey notification area, right click on the black glass icon and exit. Close the open windows and then reopen those.
Hopefully the glitch will not be there anymore.