Cannot export as .otf

Hi all,
So, I am very very new to this program and I have created a font but can’t seem to export them as a usable .otf file that I can install and use. I have been trying for the past few days to complete this project but I’m completely stumped. I have attached a photo of what it exports as which just leads me back to the glyphs project.
Thanks in advance
( p.s don’t know if it matters but I am using the trial)

06%20PM

The UFO in the screenshot is from a different export. If you export with these settings, you should get an .otf on the desktop of user dazzlindeja.

In Finder, choose Go > Desktop and sort by Date Added.

You should be aware of this when you are installing your fonts:
http://www.glyphsapp.com/tutorials/eliminating-font-cache-problems