Now it wont produce a log.txt
Because you made the same mistake again, of not following my procedure exactly, skipping those two steps:
Go the the Addon Manager folder with the Window File Explorer
- Open a new command prompt there, by typing "CMD" and then Enter on the blank address bar on top of the explorer windows.
You haven't done that, so the command prompt opened to the default location, which is your user folder, and the updater is just not there.