Well, here’s a thing I didn’t know about before that might be useful to you – a tool to extract the dated from the *.crd files.

https://github.com/sbechet/crdextractor

My dad insisted on using CARDFILE.EXE from Windows 3.1 up until he switched to a MacBook in 2010 or so. I still have the data file somewhere.

Gotta admit tho, it was one of the most useful applications that came with a PC back in the late 80s/early 90s. My folks put everything into that thing. They probably had about 350 cards!