Lotus Notes client SSO problem

After rebuilding my laptop end of last year for some reason the single signon, although installed, did not work as expected and every time I started Notes I had to key in my password. Not a big deal, but definitely annoying.
Searching the web for clues also did not bring any anwsers.
The other week the old laptop was replaced by a new one. Data was copied over from old to new machine, except for the notes.ini file which I deliberately left out hoping it would solve the problem. Well it did not!

At the same time I had for some reason clicked the option to use the workspace bookmark as homepage once too often and the client also started up with the home tab and a workspace tab. Again not a big deal, but annoying. And I could not figure out where that was configured.
After going through all the options in the preferences and all lines in the notes.ini and no luck, I also checked all the folders in the "open list" button (or open list "dock" sidebar). In the "more bookmarks - startup" folder I found the workspace was listed twice. Removing those would at least solve that problem!

And indeed next time starting the Notes client, the extra workspace tab was no longer there. But more important, for some reason the SSO started working again as well. Yeeh!!

I wonder if anyone else has encountered this nice little problem as well?