Are you asking about an FRC robot program? You may want to try posting in the FIRST Robotics Community.
The program on the cRIO is compiled, so you can't get the code from it. I recommend that you search the hard drive for .lvproj (LabVIEW project) files, perhaps someone just renamed the folder that contained your project? Also check the Recycle Bin, of course, and see if it was deleted but can be recovered easily. You'll need all the VIs, not just the lvproj file, but the lvproj file is a good starting point since the rest of the files that are part of the project are probably in the same folder.
