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Yes. Windows 11 still has a version number that starts with 10. Go figure.
I'm more inclined to think it's a borked older installation of Calibre that's the problem. Could still be a graphics card/driver problem, though. But then what graphics card would be sufficient for Windows 11, but not sufficient for Calibre 4.x?
When did Calibre's switch from WebKit to WebEngine happen?
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