Translation update problem

Hello,

I use .wpusermanager. I’ve successfuly translated from english to french some sentence as

This content is available to members only. Please login or register to view this area.
to
Ce contenu est privé. Veuillez-vous authentifier ou enregistrer

I save translation, translation appears.

Now, I come back to loco to update the same sentence translation:
This content is available to members only. Please login or register to view this area.
to
Ce contenu VR-Guide® est privé. Veuillez-vous identifier ou vous inscrire pour y accéder !

I save the new translation, I empty browse cache, I empty WP super-cache,
but updated sentence translation doesn’t appear???
– of course if I go bacl to loco, I retrieve the right translation.

Any idea ?