Thanks for getting back to us in the Community, @Sunrise Secretary. I’ll share some thoughts with each of the details you need so you’ll be able to sort this issue with QuickBooks Desktop.
To answer your first question, restoring your backup company file doesn’t remove your current file. It serves as a save point for your accounting data.
For the second question, you can remove it from the list of company files after you’ve got the information you need as long as you have Set number of previous backups.
You can follow the steps provided by my colleague @Adrian_A above on how to Set number of previous local backups.
Check these handy articles for your guide about backing up company files in QBDT:
Additionally, I've got this helpful resource to guide you further on how to fix backup company file issues.
Stay in touch if you have any other questions or concerns with QBDT. I’ll be right here to answer them for you. Enjoy the rest of the day.