I upgraded from an older Compass to 1.39.1 using the 64-bit msi installer on Windows 10.
I found that Compass would not open until I deleted the directory “%APPDATA%\MongoDB Compass”. I also deleted the directory “%APPDATA%\MongoDB Compass Community”.
While trying to solve this I tried 1.38.2 and 1.39.0. All installations would not open the GUI but could be seen as tasks running in Task Manager. I uninstalled Compass, deleted the directories above and after a clean install, the Compass GUI opened.
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