Next things to try...
Close the program, Relaunch it and before loading anything go to OPTIONS | DISK tab and Clear Unused Cache Files.
If that makes no difference...
Shut down Videopad. Using your PCs file manager (Windows Explorer), locate this folder and delete all the files it contains.
"C:\Program Files (x86)\NCH Software\Components" or it may be a similar path without the (x86). Then reinstall Videopad.
If still no joy...
You have supplied the files, but not the VPJ control file. Please re-upload, and include the file that has the VPJ extension.
If the file is nowhere to be found, load the project best you can and click the Menu (top-left), then FILE | SAVE PROJECT FILE AS. That should create it.