Some years ago a number of my data files were "left behind" in an update. I haven't been able to open them for a few years now. It doesn't affect my current portfolio but it does affect my historical ROI and other calculations.
Is there a simple way to update these files and make them compatible with the latest FM release? There are about 55 of them for old investments I no longer hold that somehow got dropped from the portfolio I migrated forward some time ago.
I don't know what version they are but most of them appear to have been last modified in January of 2014.