
When I start Connect IQ SDK manager I'm logged in though.

When I start Connect IQ SDK manager I'm logged in though.
No only after the new version was installed and today. Win 11.
That's a known change which was called out in the SDK changelog.
VS Code > command palette (CTRL/CMD-SHIFT-P) > Monkey C: View Documentation > README

I still don't understand how it's possible for older ERA viewers to work, unless credentials really aren't necessary for the ERA, or if the older ERA viewers use credentials that are already cached elsewhere (but why would the change be necessary in that case).
Maybe it's possible that older ERA viewers will stop working at some point, and this is just some transition phase.