To delete a filter from within EndNote:
From the Edit menu, select Import Filters > Open Filter Manager.
Select the filter to be deleted.
Select Clear from the Edit menu, or Control-clickright-click on the filter and select Delete from the shortcut menu, or press the Delete key.
You can also delete an unwanted filter by switching back to the Windows desktopMacintosh Finder , and opening the appropriate Filters folder (see Folder Locations Preferences). Then, drag the filter from the Filter folder to the Trash select the file to delete and select Delete from the File menu or drag the file to the Recycle Bin .
Note: You must have read/write access to the Filters folder in order to delete a filter. If you do not have administrator access, you likely will not be able to delete a file located within the Program Files folder.