Welcome to the Reckon Community.
That's some great mileage out of your programme.
Unfortunately only Australian/NZ versions of QuickBooks will upgrade to current editions of Reckon Accounts Business/Hosted.
It may be time to consider a new company file as the integrity of company files diminishes over time and with change of operating systems. See this guide on starting a new company file to bring across all your lists, balances and open transactions into a new file.
I don't use the application often, it's mainly used for property management so I only open it to enter bank statement data and to do six-monthly GST returns and the annual account preparation. The data file is only about 5MB. It now only runs on a very old laptop. Should I buy a new basic Reckon desktop package and try to transfer/import opening balances from my old file?
The problem with old files is running on new technology. While you have an old machine to run the old programme and you are happy with the arrangement, then stay with it. However, once that machine has to be replaced you'll experience some loss of functionality and perhaps irregular behaviour with the old programme. It comes down to picking your time.
Hope this helps.