Choosing a ZOOM Aspect Ratio preset may help...
Or use the CROP effect instead, and SCALE if necessary.
Search for other VPJ files on the PC - it's possible that you are loading an earlier save. A VPJ file loads a project exactly as it was when the file was saved. Save Project File AS routinely, giving it a unique # or name, so as not to overwrite prior saves. Using Save Project Files (no AS) will overwrite. From the HOME tab, that choice is available by clicking the chevron to the right of the Save Project button on the toolbar.
Never move or delete source files until certain that the project will never be edited again.