Is MuseHub a Trojan horse?

see musescore.org/en/node/341105
if you click once “Save to cloud”, even when cancelling the actual save operation, then every time you choose “save as”, the credentials for musescore.com are asked.
This is controlled in the ini file (in Linux: ~/.config/MuseScore/MuseScore4.ini )
lastUsedSaveLocationType=2
if the option is reset to
lastUsedSaveLocationType=1
then no more attempts to save to the cloud are being made anymore.
(perhaps this has changed meanwhile, i did not check)

I would install the Muse Sounds Manager (www.musehub.com/ at the very end of the page) instead of Musehub. Then, at least you don’t have to deal with an insecure service anymore.