[Users] Wtf?! Claws doesn't find my accounts anymore!

[Michael]

Ralf Mardorf, maybe you should've told him just 

 sudo chown -R Ralf:Ralf /home/Ralf (in case the username is 'Ralf')

to fix the issue ?

If that was the problem at all, that is.

Ralf Hutter, maybe you somehow used a sudo on something related to claws (like starting claws via sudo and then create the second account?) which can leave things with permissions not accessible for the daily non-sudo user.
Normally, claws does not need you to 'sudo' anything.

--mi