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Hello all, I have an odd problem which will not go away. Nitro Pro is my default PDF viewer. When I double-click on a PDF the NitroPro splash screen appears, in the taskbar the program appears to be open, but I can see it nowhere. When I Alt + TAB the preview of NitroPro is simply a blank box that appears to be the same size of the splash screen. When I open the program directly from the start menu, it does the same thing. Program opens but nothing happens. I have Windows 10 Professional and Nitro Pro version 12.6.1.298 with a Surface Book 2. I have already "repaired" the program via the Apps sub-menu in Windows Settings and still nothing. I'd like to resolve this as soon as possible. Best, GGG