Cant download vids!

I love this app when it comes to creating videos. I always download YouTube videos and edit them to look cool and stuff like that. But now I cant do that anymore. It says "cant download. Choose another" everytime I want to download a certain video. It frustrates me a lot now that the money I put in the app is basically worthless. Please fix this! I would love this app again if this is all fixed and up and running.

Limited lifetime about VidLab・Video Editor & Overlay, v1.15