I went to the file explorer program and loaded in the information as presented below by Ysabeau: For Windows: C:\Users\Miguel\AppData\Roaming\inkscape\extensions, that I had gotten from inkscape at edit>preferences>user extensions.Copy and paste to file explorer. I then unzipped the file to my document folder.
I used the windows and just downloaded the Zip file to my download folder. in German (de), French (fr) and English (en). I downloaded the one I needed for my computer, it offered up linux, Mac (-osx-), and Windows (-win32-). First I went to this web site:, as noted below and hunted for the InkStitch embroidery extension. so it took me a while, and my daughters help to work it out. I don't know if you are still interested in this or if you worked it out, I am not very tech savy, being a plug and play kinda guy, and it was obvious from the answers that the author AM and Ysabeau were much more so than I.