The drop-down list of tags offered when adding a task differs from my list of tags in my settings. There are a number of tags that I have deleted, or are not actually in use (added accidentally) that show up when I type "#" to add a tag in the Smart Add function.

Is there a way to control which tags show up in the drop-down menu? This would be very useful, since it is becoming harder to find the tags I actually want to use.