Click HOME on the toolbar. To the right of the OPEN button, click the chevron. A project file has a VPJ extension. Double-click it to load a project.
See if the VPJ that you need is there.
Also look for a VPJ file in DOCUMENTS folder: "C:\Users\<your account>\Documents\VideoPad Projects"
And in "C:\Users\<your account>\AppData\Local\Temp"
Last resort: do a search of the PC - for any VPJ files.
It's wise to SAVE AS regularly, and for good measure FILE|BACK UP PROJECT FILES TO A FOLDER.
Good luck!