I had a similar issue when I upgraded to Windows 11 with some of my older software. What worked for me was tweaking the compatibility settings for the program. Have you tried right-clicking the application icon, going to Properties, and then to the Compatibility tab? From there, you can try running it in compatibility mode for Windows 8 or even Windows 10 if needed. Sometimes that can smooth out those GUI glitches.
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Windows 11 Pro key, so finding a reliable source for your OS is crucial. A friend once recommended a similar site when I was updating my system, and it made the process a lot smoother.