Technical Support for Jaksta Media Recorder

I mainly use Jaksta to download tutorial videos on youtube so that I don't have to find them again if I need to reference them. I have noticed that on some videos, the ad will download with audio, but the video file itself is lacking the audio. Usually, I have to keep refreshing the page until Jaksta finally gives me a video file that has the audio, but it's annoying to have to repeatedly refresh the page until I can get the complete video, plus it doesn't always work. When the video files have no audio attached, the file has '299' appended to the end of the name. I tried deleting the old app and preference files, rebooting the system and doing a fresh install, but with no luck. I also tried the beta I found in this link, but this did not work either.