What Does This Plugin Do?
Installing this plugin will add a new attribute type to your site - the fileset attribute. This does not add any attributes - it allows you to set up attributes where the user will select from a list of filesets you have on your website.
How Do I Add An Attribute?
Attributes can be added for pages (Pages & Themes > Attributes), files (Files > Attributes) and users (Members > Attributes). If the attribute you want to track is a fileset, then go to the relevant attributes page, select "Fileset" from the dropdown under "Add Attribute" and click "Go".
I Don't See Fileset As An Option.
When you install the plugin, the fileset attribute type will be available to Pages, Files and Users. But perhaps this was changed in the settings. Simply go to System & Settings > Attributes > Types. You'll see Fileset towards the bottom of the list. Check (or uncheck) the boxes in that row to add (or remove) this option for each attribute type (page, file, user) and click "Save". When you go back to add an attribute, you'll see the Fileset option if you checked the box for that type.