For those who want to use the Deamon App instead of the web page, here is how to do it :
Download deluge software from the web page, install it, start it. Go in the Edit section, click on Preferences. In the Interface section, uncheck "classic interface!". Put that on the side for the moment.
Install the plugins in unRAID, open the web page (http://tower:8112), log in using the default password (deluge), while you are there, change the default password for whatever you want.
In the Preferences, look into the daemon section, and tick "Allow Remote Connections".
In CLI, copy and paste this : nano /mnt/<where you installed the deluge plugins>/.deluge/auth
You will see one line, "localclient:5872546246321784623874234:10" (the string of numbers if different for every user)
username : localclient
password : 5872546246321784623874234
acces level : 10
If you want to add a custom username and password for sharing deluge account (for exemple), you can do it there. There is a section on the deluge wiki that tells how (http://dev.deluge-torrent.org/wiki/UserGuide/ThinClient#AddUsertotheauthenticationfile). Read also on the acces level.
You will need to restart the deluge plugins to apply changes (i needed to restart two times to make deluge understand you allo remote deamon connection)
Now come back in the deluge software. CTRL+M, click ADD ...
HOST : your unRAID ip
username : localclient
password : the string of numbers
Click ADD.
You can now use the Deluge on your Windows or linux box instead of the web page. Easier to configure, and work with most of the plugins (like AutoADD)
(If someone want to make a better guide than me, go ahead)