I have recently upgraded this week to a refurbished zfold5 and I have been using it for over a week and my software has not updated from 5.1.1 with October 2023 security patch. I regularly go into update software and it states software is up to date. I know there is a a new 6.1 in the UK but I would be happy with 6.0 and a more up to date security patch. Is there anything I can do?