We had a little more success with two other conversions that I was expecting would be more of a challenge. One of the company files we took down from QuickBooks Online back into a QuickBooks Pro 2017 desktop software. Easy peasy.
The last one was bringing an Enterprise Solutions version back into QuickBooks Pro 2017. Intuit says it can't be done. We required the assistance of a third party conversion partner but it appears that their part was completed within 24 hours. I'm working remotely on this one so we'll verify it and restore the data files into the new QuickBooks.
Convert Quicken into QuickBooks. Working on it.
Convert QBOnline into QuickBooks desktop. Done deal.
Convert Enterprise into QuickBooks Pro. Third party assistance but it will work.
I'll let you know how it goes! Nothing is impossible!