There are a number of tools for managing Memo Folders. The "Tools" menu list allows provides for:
Adding a new Memo Folder.
Sorting the Memos in a Folder.
Completely deleting a Memo Folder.
Resetting the learning records in a Memo Folder.
Resetting the learning records in all Memo Folders.
When the learning records in a Memo Folder are reset, that Folder is treated as if none of the Memos there have been learned or reviewed before. Otherwise, the reset has no effect on the contents or order of the Memos.