The "Open/Create/Replace File" is just a VI that comes with LabVIEW. So when you saved it, it overwrites the original version on your hrad drive, so it's gone.
Since I'm not sure how NI would feel if I posted one of their VIs here, try dropping your LabVIEW CD in, and select Repair when the choice comes up. I think that will reinstall everything for you.
Ed

Ed Dickens - Certified LabVIEW Architect
Lockheed Martin Space
Using the Abort button to stop your VI is like using a tree to stop your car. It works, but there may be consequences.