At my work we have a legacy system running on it’s last legs. I spent some time figuring out how to export data from it, and documented it for other’s to reference. Here’s an except:

“We have a legacy application that serves our Imaging department that runs on Helix (Rade version 5.2). Helix is a “visual” application development environment that hasn’t been in active development for over 10 years and only runs on Mac OS9 (edit: until recently). Our application isn’t in active use, but is still queried for legacy information. Documented here is how I exported data from Helix to import it into a more practical database, like MySQL.”

Read more here.