AVD version 3.0 now provides a Native Application used for communication with browser extension, configuration files and required dependency libraries.
More about new AVD 3.0 you can read in our article here: https://support.ant.com/hc/en-us/articles/115005568983-About-the-new-Ant-Video-Downloader-3-0
In case of problem with new nwe AVD 3.0 please contact with details to our support at https://support.ant.com/hc/en-us/requests/new