have same problem and now crash´s...
Can you try capturing a couple of videos from a site or two including YouTube, and then send us the log file? You can find it by going to the Preferences and clicking the Find Log File button.
I tried playing videos from multiple sources, including You Tube, and the Jaksta program won't initiate a download. I have the blue slider to ON at the bottom. What is wrong? How do I make it work?