I'm using Blender v.2.82 but get this screen:

and no matter how many times I restart blender, I get no new options for importing or exporting

what am I doing wrong?
newest blender version is 2.9
do I need an older version?
I have another PC with v.2.77 installed because it has a plugin installed (does not support animations in mdx files) that requires that particular version

I do notice something different though, if I try to install the warcraft 3 plugin meant for v.2.77 in to v.2.82, then blender does not complain but the warcraft 3 plugin is not shown at all in the list of plugins... so whatever is wrong with the gzdoom plugin, it must be something different
I eventually gave up but since it seems that nashs plugin is not dead then I hope you guys can help me. I hope to be able to help expand the functionality of the plugin at some point