I click on New Smart List and nothing happens, how do I create a Smart List?

Essentially, Smart Lists are "Saved Searches", so in order to create a smart list, you need to first either apply a date filter, a tag filter, use one of the pre-sets or type into the Searchfield. 

When you click "New > Smart List", keyboard focus is sent to the search field, where you’ll need to type in a search word. We would highly recommend you checkout the various examples given in the manual. Smart Lists are extremely powerful and very easy to use.

To ’edit’ an existing smart list, you simply have to change one of the filters or the search word used and hit the update button displayed on the left of the search field.