the horizontal divide between e-mail list and selected e-mail body always appears somewhere up instead of in the middle of screen as i set manually after new start of app. 
Interesting, it does for me. Based on your other issues (the “+” in the file name). I might suggest doing an uninstall and a reinstall. The uninstall routine does not delete the data, so when you are done with the reinstall, you should be back where you were (a backup is always a good idea, however). If that doesn’t work, then maybe do a clean install (fresh database) by deleting c:\users[user_name]\Appdata\Roaming\eM Client before the reinstall.
from today it works already