To open an Exodus file you need Fortran. The information is on page 18 from the next document:

https://www.osti.gov/servlets/purl/6902151

And another option is to convert the Exodus file to ASCII

You can do that under any Unix system with the next command:


Source: https://coreform.com/cubit_help/finite_element_model/export/exporting_exodus2_file.htm

There is a lot of information online about this kind of file and how to deal with them, I hope this information help you to recover your coins.