[Milhouse]

The problem is your AFTV is running an old version of XBMC, that doesn't support the Textures JSON API. Without the JSON API, which provides remote access to the texture cache, the script is forced to directly access the userdata folder of the AFTV. Since you're running the script on Windows, that's never going to work, as Windows can't mount the AFTV SD card.

Your best option is to run the script directly on the AFTV, so that the script has direct access to userdata, or upgrade the AFTV to Helix which does support the Textures JSON API.