Yes, that should wipe the maclist filters clean....if not, it means they REALLY changed something.
thanks - the commands wiped alls entries from the maclist filters
Added all mac-addresses again and now everything is fine.
I found only another issue with the maclist.
the old mac-addresses were still visible on the guest-network page. As soon as I tried to delete an entry from this page, the router-login page was displayed.
In this case I have deactivated the guest-network and configured a new one - now I can add and delete mac-addresses from this page also.