I uninstalled 1.8.3 and installed 1.8.5 beta 6 but no changes. Except different output.log messages and a crash on the first try (see attachment) . But no tagging at all.
So I uninstalled 1.8.5 and found that the plugin was still there in Unreal. So I deleted everything related to Dash/GraphN and reinstalled 1.8.3. No success with tagging.
As you can see there are a lot errors with atlasses. Is it possible that the path is too long? Or is it the double backslach in the path (...\atlas\Dry Leaf Scatter_pbDiW2\pbDiW2.json)