I've been using Quickbooks Pro 6 for about 20 years, and have recently installed it under Windows 10.

Although everything functions ok, the software keeps asking me to register the product. Each time It accepts the registration details as correct, but then asks for it again a couple of days later!

I decided to take a look at the latest desktop version, but have only been able to find a trial download of Quickbooks UK 2015.

Having installed the trial version I've not been able to open my existing company file and get the following message - "This company file is too old for Quickbooks to upgrade directly"

I'm not sure how to proceed at this stage. If I can't fix my existing software issue of repeated registration requests, or trial or use my existing data in latest software, then I'll have to start from scratch.

Hope someone can advise. :)