Thanks Jim,
I was checking through the restore info on here and found something weird. The version I successfully upgraded to MC24 on my HTPC has a given Registration Code which I understand should be permanent and unique to me - the emails from the buy button earlier in the year shows the code. The version of MC23 on my laptop seems to have a different Registration Code which I discovered when reading through the email from the restore I tried to do last night. Just to add to the complication, the original upgrade and install key was done on the 30th November so may have come to the end of its 14 day validity last night, but can't be sure.
So I'm not sure what to do now. Should I install MC24 on the laptop, restore the licence using the Registration Code I know worked in November and get a new MC24 install key, or will this cause confusion with the wrong Reg Code which seems to be stuck on MC23?
I've no idea how I got 2 codes so would welcome a bit of info on this too please?