@downeastmarineca 

There is no migration path for QBSE. You may be able to migrate from QB Desktop to QB Online.

https://quickbooks.grsm.io/US

https://quickbooks.grsm.io/us-promo

Restore your QBM file on trial license of Pro 2020. If you couldn't restore it, your data file is too old. Call and ask Intuit Data Service to convert it. Should you need to resolve it in due course, consider purchasing a 3rd party conversion service.

Hope it helps.