So I just downloaded the latest PI (hadn't done it on this computer yet)...
After installing it, it found two updates, one related to the documentation, the other containing bug fixes on the core app...
When I try getting them, eventually the application asks me to identify myself.
Since I'm a dummy and I don't remember my password, I go to the web site and change it.
I am then able to log in to the pixinsight.com web site.
I restart PixInsight, and during the update it asks me to identify myself again. Well, now I know my (new) password, right?
But the application still goes "Invalid User Authentication Data".
So I can't get the updates and I don't know what exactly is going on.