I have looked through this forum to locate a section that I can post a question about plugin export but I can't seemed to find anything that is close therefore I thought I drop this question at the top.
If I'm in the wrong area please let me know and I will repost the question otherwise here is the question.
the file you downloaded has crap documentation - none. the link you provided says "There will be differences between the documentation here and the product in your hands, and you may have to figure out quite a bit for yourself." and that holds truth. you can open your pluginmanager and hit the [I] for information. it will tell you which commands the plugin provides. each of them opens a window to set options and export something. it is more trial and error than anything usable at first look at it.
You're right BabyDuck not much useful doc for the plugin. Its mostly trial and error on how to get the plugin to work. And I have trialed and errored on this plugin but no such luck. I went into the [I] and see the commands. I ran this command
'utexportmesh c:\projects\characters\scenes\char01.mb' from the script editor but I got this
// Error: utexportmesh c:\projects\characters\scenes\char01.mb; //
// Error: Syntax error //