That looks like your computer’s built in sound card.
When you connect the mic it will prompt you to select “Mic” or storage device. Select the mic option. I think it may then prompt you to select the “Sample Rate” - if it does, select 44100. When that’s all done and the mic is connected to the sound system, launch Audacity (not before). You should then see a USB option in the device toolbar - I think you only get mono/stereo available, and to select front/rear is done on the mic not the computer (check the H2N manual for details).
Ah, I thought I didn’t have to go the preferences to select the mic when I used it with Audacity some years ago, but I couldn’t find the toolbar this time. Now that I know what the toolbar is called, it doesn’t seem to have anything to select on it, picture (don’t know from where that shadow came from): http://i.imgur.com/FESs4EV.png
The mic is connected to the computer in the audio interface mode. It seems I can use it by selecting any of the options via the Preferences, though it still doesn’t show in the device toolbar.
The shadow is because the toolbar has been dragged out of its dock position (it is now a “floating toolbar”). You can reset the toolbars to their default docked positions with “View menu > Toolbars > Reset”.
Have a look in “Help > About Audacity” and go to the “Build Information” tab. What does it say is the WxWidgets version?