I've also done this a few times, when it downloads it appears to recognise that there is a current licence and opens as normal, allows input etc. We've tried it on a pc without the software and it won't open at all. I am worried that we can't test this properly and that we won't be able to supply clients needs as and when required in the future. I am now contemplating extracting copy invoices, reports etc in the format likely to be required by client & HMRC (they will expect us to be able to supply detail). This is going to take us the available 3 months we have left. We are not a happy camp!