BillVidWork

I have a project that uses one video file. I have VideoPad installed on two PCs. When I copy the video file (.mp4) and project file (.vpj) from PC#1 (Win7) to PC#2 (Win10), and I open the project file, the audio track is not present in the project on PC#2 and no audio plays (in neither the video file played in video pad, nor the sequence). The audio is flat-lined in the audio track. If I play the mp4 file outside of VideoPad, the audio plays just fine. If I copy the files from PC#1 to itself (PC#1 in a different folder), the audio works just fine in VideoPad. Any ideas? I'm trying to be able to work on videos on these two different PCs.