Can anyone download subtitles with youtube videos since 1 March 2016?

The ability to download subtitles with youtube videos using 4Kvideodownload stopped working around 1 March 2016. In non-Smart mode the dialog box refuses to change from 'annotation' to a language. In Smart Mode it is possible to specify a language in advance, but nothing is downloaded. After one month this problem is making 4dvideodownload unuseable, which is sad because it has been a fantastic product. I use a Mac (2011) OS El Capitan 12Gb RAM Intel I5.