The top section of the My Subsets menu is different for every user because it shows the Subsets which are installed in your own unique Subsets Folder. Your Subsets Folder can also contain subfolders which can contain subsets or more subfolders and so on.

Below the folders come any subsets that are loose in your top level Subsets Folder. Just click on a subset to switch to using the deck associated with the subset with just the reduced number of cards it contains.

Create New Subset This launches the Subsets Wizard in Create New mode.

Edit Subset: Selecting this item lets you browse for an existing Subset and then launches the Subsets Wizard in Edit mode.

Subset Management launches the Subset Management Tool.

Refresh This rebuilds the My Subsets menu. You may wish to use this if you have manually added to or reorganized your Subsets Folder outside the program e.g. using Windows Explorer.