default extensions not working

I recently downloaded avast browser and it comes with adblock and a video downloader but neither seem to work. I tried to repair avast and turn the extensions on and off while closing and reopening the browser(every website i go to i get ads and i dont see a download option for videos on youtube). So how can i make them work?

Thanks for the help all i guess i will just uninstall avast browser then.

Try a clean reinstall of ASB as outlined by Bob here: https://forum.avast.com/index.php?topic=219479.msg1464722#msg1464722