MHX2 import in 2.79 and 2.80? Has anyone had any luck installing the mhx2 importer under Blender 2.79 or 2.80 under Ubuntu 18.04?

I have followed the installation instructions correctly, and in Blender  2.79, User Preferences installs the files and shows that the mhx2 importer is installed in the "Makehuman" category.  However. when I activate the plugin, this message appears:

This script was written Blender version 2.80.0 and might not function (correctly), though it is enabled

No mhx2 option appears in the file Import menu.

So I tried downloading and installing the Blender 2.80 beta, then installing the mhx2 plugin, but the results were even less satisfactory.  The installation proceeds without errors, but the Preferences pane does not show that the mhx2 importer is installed at all.

What am I doing wrong?
I can now answer my own question.  The mhx2 importer DOES install and enable under Blender 2.79.  What threw me off is that A: the error message I've quoted in my original question still appears when it's enabled, and B: the mhx2  file import no longer appears in the Import/Export dialogue where I expected to find it.  Instead, it is in an (apparently) new "mhx2 runtime" tool tab.  "Import MHX2" is now found in this tool tab.