I started up Solidworks 2015 SP5 [and not for the first time] and certain tool buttons are missing, specifically the flyout toolbars for the various rectangle tools and the one for the different line formats. I first noticed they were missing from my S-Key and after searching throughout the program I can say that they are missing from the command manager toolbars and any menu option in the Customize window. Restoring settings from my last saved settings file does not cause them to reappear.
Stephan,.. are you saying, you reactivated the missing tool buttons and then saved your settings (*.reg) using Copy Settings Wizard,... then exited, and when re-opening 2015, the tool buttons are gone?... Then, when you try to restore your last saved *.reg using Copy Settings Wizard, the tool buttons still do not reappear?
Do you have Admin rights.. that is, if you're using a network and roaming?