Opensubtitles popup box every time I start a movie

I’ve been playing about with my Kodi 16 configuration.

Now, when I start a movie, after a few seconds I get a popup screen “OPENSUBTITLES.ORG. BY OPENSUBTITLES” and a message “No subtitle services installed”.

The thing is, I have actually uninstalled Opensubtitles (and all other subtitle addons).

I have also unchecked “Enable subtitles” and “Set as default for all videos”, but with no joy.

How do I stop this box from popping up?