"Discovered Intuit disallowed any use of the program last fall."
QB 2008 reached end of life in May 2011. Intuit has a 3-year lifecycle. Plus the program undergoes major revisions, such as happened in QB 2007, 2013, etc. That's why it helps to keep updated with the program. And your file can be updated in Interim jumps, or ask Intuit to update it for you, when you buy QB 2019. Also Microsoft makes only QB 2016 and later compliant with W10 at this point in time.