[SOLVED] Caja-dropbox missing

I made a fresh install of Ubuntu Mate 15.04 and after I’ve installed Dropbox via web (dropbox.com). I have my files syncronized and I have the Dropbox indicator at the upper bar, but I have no indicator on each file when I see them using caja.
In fact I have no caja-dropbox file to install, when I look for it with synaptic.
I googled a lot… but I find no solution.
Any help would be apreciated.
Jesús P

Answering to myself:
All I have done is to partialy follow the instructions from https://ubuntu-mate.org/blog/ > “Ubuntu MATE 14.10 and 15.04 Useful Information” > “Indicators”.

I have done:
sudo apt-add-repository ppa:ubuntu-mate-dev/vivid-mate
sudo apt-get update
sudo apt-get install caja-dropbox

And after a restart all works out of the box.
Best regards,
Jesús P