Opened saved mrml on another computer and all the work was gone

Operating system: macOS Mojave
Slicer version: 4.11.20200930
Expected behavior:
Actual behavior: I posted about having trouble with macOS Big Sur. I downloaded this version of Slicer onto a computer running Mojave. When I opened up saved Scenes to Slicer on this mac, it was as if I had done no work on the project and it was being opened for the first time. No colored segments were revealed. It was like no work had been completed. Suggestions?

A post was merged into an existing topic: Upgraded to macOS Big Sur and can no longer use Segment Editor on saved scenes (mrml)