Do you see any results when the tap2find box is empty (e.g. there’s no MIDI block in the drop zone)?
Do the other filters work (for example, do you see fills when you select Fills in the Type column)?
Do you see all your libraries under the Library column in the filters?
Many questions but it will help us to understand what’s causing the problem 
Henrik Ekblom - User Experience Designer
Toontrack
In Logic Pro X – go to Window menu and select “Show Keyboard”. That will bring up an on screen keyboard. On the top left corner, press the icon that looks like an A button from a keyboard. Now you can use your keyboard as an MIDI keyboard.
I think that most of the modern DAWs has this feature built in.
Henrik Ekblom - User Experience Designer
Toontrack
To clarify – when you right click on a drum and look at the kits – those kits are the ones available from the currently selected library. On your screenshots you have the EZdrummer 2 Modern library loaded, so the kits you see in that list are the kits available in the EZdrummer 2 Modern library.
You should see Americana in the list on screenshot “Screen-Shot-2015-02-22-at-11.36.40.png” (since you’re able to use an Americana snare on other Libraries) – as soon as you have authorized Americana (see Scott’s post below).
Can you find the Americana in the EZX Libraries menu (the orange menu on the top of EZdrummer 2)?
Henrik Ekblom - User Experience Designer
Toontrack