JK_Jackals

Please help me. I just spent hours upon hours making a video with videopad. it wouldn't let me export it so i went to control panel to try and go back to the free version because that's what i've been doing. I hit repair and it got rid of the video so i went into my old projects and it wasn't there. i went into my files and found the video but when i click on it it says, "This file isn't playable. That might be because the file type is unsupported, the file extension is incorrect, or the file is corrupt." Please help me because i'm on the verge of tears because of how mad i am