Hello bcardi,
I'm not sure, did you uninstalled the software according to the documentation below?
https://www.boxcryptor.com/en/help/faq-and-troubleshooting/macos/#how-to-uninstall
If yes, then please contact us via support(at)boxcryptor.com by referring to the post here and sending a debug log too:
https://www.boxcryptor.com/en/help/faq-and-troubleshooting/macos/#how-to-create-a-debug-log
Yasmin