Hi Brian,
I'm sorry to hear you're having trouble with a project on RStudio Cloud. Based on the screenshot you provided in the other post, I suspect the issue is that the file browser is looking at the wrong location for your files. I took a quick look and the files are still there.
I suggest you try this workaround:
Step 1) Click the "..." button in the file pane.

Step 2) Type "/cloud/project" in the dialog box
Step 3) Click "Ok"