Added Language file, plugin doesn't get translated

Ok, I exported the Swedish language file for the plugin User Activity.

Both, po and mo files.

Uploaded to Plugins: /wp-content/languages/plugins/ as per manual.

I also uploaded to plugins language folder like it says in the manual too: “You can just drop it in the plugin’s languages folder.”

Still, it does not show up in Swedish.

I have logged out and in again. Tried to refresh browser etc.

Am I missing something simple here ?