Okay, I updated the README.md file on github, adding in download instructions
It appears I cannot edit my first post to add in download instructions, so I’ll add that info here.
On the github page for this extension, look for the green button ‘Code’:
Clicking on that button will bring up a popup menu:
Select the ‘Download ZIP’ option to start a download of all files. Once the .zip file is downloaded, copy the two required files to Inkscape’s extensions directory. Additionally, all three files could be un-zipped to Inkscape’s extensions directory. Inkscape should ignore the ‘README.md’ file. (not tested)
Hope this helps,