Hi Gina,

Thanks for letting us know. Here is a guide on how to open older files in newer Revit versions: https://www.autodesk.com/support/technical/article/caas/sfdcarticles/sfdcarticles/Backwards-compatibility-of-Revit-with-earlier-releases-of-the-software.html

Just be advised that this upgrade process is not reversible;  once upgraded and saved, the file cannot be opened in the older version  of Revit.

All the best