StickBoyTV

Hi So I've been using the free version of videopad for a while, making my YouTube videos... There's only one problem I'm having though. Whenever I close out of the program and come back in, everything's the same, but the audio is mute in some spots, and in others the audio is in the wrong place. I did a lot of hard work on my video only for all the audio to be all over the place. Why could this be? Thanks in advance if you do have the answer.