Hello Christian,
Good day! I'm John Dev a Windows user like you and I'll be happy to assist you today. I know this has been difficult for you, Rest assured, I'm going to do my best to help you.
Rest assured, doing a Reset with the Keep my files option selected will return your Registry to default.
Kindly let me know if this helps or if you have any further concerns.
Kind regards,
John DeV
Independent Advisor