Hi batista230
"......If I double click on the file from the C drive, ......"
I have to assume you are double clicking the previously saved vpj file like this one?
"..........it loads the program......."
By "program" are now referring to Videopad? If so That is correct! Clicking a vpj file will start by opening VP.
".....and tries to locate it in either the E or D drive which is not attached to the computer at present....."
That is normal. The data held in the vpj file tell VP where the clips were when they were used.
"........It would appear now that it is looking for the original files that I made the used in video pad file up with in the first please place........."
That is correct!...In this case the clips in question are not present on your C drive and VP can't find them. It knows from the vpj file data that they were stored on either the E or D drive but these are not attached to your PC. It therefore brings up the Resolve Missing Files screen...
Here is an example where images for a project were stored on a removable drive. (Drive H ) The vpj project file was saved to the C drive. The portable drive was removed in the interim and so clicking the vpj icon in order to load the project , loads VP as expected but then displays the Resolve Missing Files window as the drive where they are stored (H) is not connected... The expected pathway is printed in yellow......

It is now up to you to locate them!
Click Resolve button and navigate to the correct location. (In this case I would have to reconnect the portable drive and find the image files manually.
"........That would be impossible! since it is looking for the files in the D drive. And I never have had a D drive attached...."
The reference to a D drive may also refer to a USB socket. (My DVD writer/player is permanently connected to the D USB socket) Did you possibly load files from a USB key that you plugged into a USB socket? One might not always note (probably never) the actual drive letter when you do this..but the vpj file will🙂
Removing the key when finished is normal
Nat