The Easy Scan process will scan all of the files and associated folders that have previously been imported. If you wish to remove a folder from the scan process you will need to remove the files, that reside in the folder, from the Media Library.
Go to File -> Media Library Folder Structure.... This will open the Media Library Folder Structure dialog box.
Click on the All Folders option.
Find the folder that you would like to remove and double-click on it. This will display the files that reside in the folder in the Media Library area.
Go to the Media Library area, highlight the files, right-click and select the Select -> All option.
Right-click and select the Remove from Media Library option.
Select Yes to remove the files.
Go back to the Media Library Folder Structure dialog box and click on refresh.
Go to File -> Media Library -> Save to save the Media Library.
Importing Files to the Media Library
Re-Link Unavailable Albums (Files)