update.sh script tells you it's located in the downloader github

[arromdee]

(Moved from Mister Fusion github)

update.sh contains these lines:

# You can download the latest version of this tool from:
# https://github.com/MiSTer-devel/Downloader_MiSTer

Needless to say, no update.sh can be found there because of the name change. It doesn't mention a name change either, so users have to be confused, guess, and compare files.

The file I found at https://github.com/MiSTer-devel/Updater_script_MiSTer does produce a warning that mentions the name change, but the one I got in Mister Fusion doesn't contain this warning.