I'm in the same boat! One Windows laptop in the house dedicated to MS Money. With 27 years of financial history, and counting, it still does everything I need it to. Once a year I export it into Excel to do some forecasting and analysis. I'd really love if there were a reliable and future-proof way to get at the data. Sunriise[0] is the only way I know to export raw data but it has a few issues and the source code isn't public.
[0] https://bitbucket.org/hleofxquotesteam/dist-sunriise/wiki/Ho...