If you want to reset the database to start .. File->Maintain Database->Clear Database

BEWARE: This is not reversible ... This will take you to the very beginning.

Changing what is scanned does not affect what is in the Library, removing files from the Library doesn't prevent them from being scanned.

Make sure that:
1. You don't have either [url=https://www.mediamonkey.com/wiki/WebHelp:Adding_Existing_Files_to_the_Library/5.0#Manually_Scanning_Files_into_the_Library]manual scan[/url] or [url=https://www.mediamonkey.com/wiki/WebHelp:Adding_Existing_Files_to_the_Library/5.0#Using_Folder_Monitoring_to_Automatically_Update_the_Library]Folder Monitoring[/url] enable to scan these locations
2. Remove these [url=https://www.mediamonkey.com/wiki/WebHelp:Library/5.0#Location]locations[/url] from the MediaMonkey Library.

I know this should be obvious, but I want to reset the library in MM. I tried manually deleting all the stuff and deleting all the folders it monitors, but it's currently going back and re-adding everything for me. Thoughts?