Does not run with Calibre 6
see https://www.mobileread.com/forums/showpost.php?p=4240415&postcount=46
Calibre moved on to QT6, see https://www.mobileread.com/forums/showthread.php?t=344064
see https://www.mobileread.com/forums/showpost.php?p=4240415&postcount=46
Calibre moved on to QT6, see https://www.mobileread.com/forums/showthread.php?t=344064