How do you change the upload location for protected files in your membership plugin?

We have files that have been uploaded to our server that need to be protected by the membership plugin, instead of going back through the 500 posts and changing the download URL's I was wondering if we could change the default location of the folder being masked by the plugin?

In settings it's found under :options -> Download/Media -> Uploads location but it is not changeable.

Also, just to make sure I understand how this functions, if someone clicks on a link to download a file and they are not logged in they will not be able to download it right?

Thank you!