Reinstalling Cubase alone does not, in fact, reset it to factory settings.
This would be the perfect time to learn the essential troubleshooting step for Cubase, running Cubase in safe-start mode. That might be all you need to do. After that’s done it makes sense to reinstall if you still think you need to.
Hold ctrl-alt-shift while Cubase launches.
Read this for more info: https://www.steinberg.net/en/support/knowledgebase_new/show_details/kb_show/safe-start-mode-resetting-the-cubase-preferences.html