It’s kind of interesting, when I use GTDNext on my iMac at home I see a row of my areas and tags right underneath the drop down for areas and tags and under the Create New Action button. Very handy; I like that. However, I don’t see this on any other platform: my MS Surface or my android phone. Using Chrome on all platforms. It’s not a big deal at all but was just curious.
You should see a small triangle next to the tag filter drop down. If it is pointing up, then the tags and areas are visible. If it is pointing down, they are hidden. Click to toggle. Do you see that?