How to Enable MS Clipchamp to open my existing Clipchamp Project File

When returning to my PC Today, MS Clipchamp no longer lists half of my existing and Brand New Projects.

I can see the "xxx.clipchamp" Project File within my OneDrive Folder ("C:\Users\JoeRV\OneDrive\Videos\Clipchamp\miXed-Reality Demo - PTF In DCS\miXed-Reality Demo - PTF In DCS.clipchamp"), however, there seems to be NO Way to physically OPEN the File within Clipchamp, when it's not registered or listed in the Current Projects (Videos) Section within the App.

How can I simply OPEN my existing Clipchamp Project?

All the files are there (on my System and mirrored within MS OneDrive Cloud Storage) and they are Intact.

What's up with the MS Clipchamp app, today?

Is this a short-term Bug or should I simply abandon the 50+ hours of work I've invested in this latest Project. I'm at the point that I'm ready to Export it to mpg, and this is Killing Me.