This won't help you, but I want to brag. I started using Quicken to track my finances at the turn of the century, back when it was all local storage. Quicken 2012 was the last iteration that used http (not https) to update stock prices. When they discontinued support, I captured the interaction and deciphered the formats. Wrote a proxy to intercept the request, look up the security info, and send back the data.
So, I self-host quicken.com. It's saved me having to update Quicken or submit to their subscription model.