[mikeyk]

I think the issue is I'm using a Mac which in last few OS versions dropped all 32bit support.
I will re-try on a Windows machine, which still supports 32 and 64 bit at the same time.

I tried now with a Windows PC and it was OK. It also has fixed the time display format that had been there for a while. It looks like I will need to continue to use a Windows PC, as after searching on the internet all suggestions were to use a later AVR version.

I have a seperate issue now that I'm finally free to troubleshoot during holidays, I will make a seperate post for that.