Ok. Have just bought Aroma plug-in and have got to the stage of being able to apply it to individual tracks in a song. In SIMPLE steps how do I apply it to a finished complete song please (rather than go back and put it on all tracks and no doubt change the mix).Thank you and sorry for my stupidity.

Check out the review in the 2017.08 eZine, I think you'll find it helpful. It's quite a powerful plug-in once you figure out how to apply it.

Thank you very much. Will do.

To apply it to an entire mix, insert it in the FX Rack of your master bus.

Sorry I didn't provide more info, I don't like typing on an iPad. Now I have a proper keyboard 
 
Aroma reminds me a lot of the Crane Song HEDD 192, which is a helluva box. But it costs $3,600, and that's too rich for my blood...so I'm glad there's a sub-$100 software alternative. Basically, the object of Armoa is to "de-digital" audio and give it a variety of analog-type mojo. For me, the option to do mid/side processing is what sealed the deal. 
 
FWIW, I turned Michael Wagener (Queen, Ozzy Osbourne, Motley Crue, Dokken, Poison, Metallica, etc.) on to it and he likes it a lot. It's a little tricky to find the "sweet spots" because you don't want to overdo things, so the bypass button is your friend to give you the needed reality checks. 
 
 

I looked into Aroma but it didn't pass the smell test.
 
 
 
 
 
 
 
 
 
 
 
Sorry.  Had to do that!! Hahah.