Quote:
Originally Posted by CathyA
I got the same error when trying to install while a previous version of Calibre was still running. It worked fine when I tried a second time after closing Calibre.
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I got the same error for the same reason upgrading to 5.33. Exiting had somehow failed; no taskbar button or system tray icon, but it was still present and running in the background. Had to kill the process.