Correct on the license files, download and enjoy.
Somewhat correct. If you have a current SMARTnet contract on the AIM-CUE then it's a free upgrade;
CON-SAU-AIM-CUE SW APP SUPP + UPGR Unity Exp AIM $270
Most assume that a =/> CON-SNT contract on the router gives you the AIM upgrades and it does not. I don't see a part number to purchase an upgrade for Unity Express from 2x - 4x to 7x. The license for the base release comes with the purchase of the AIM. I recommend purchasing a SAU contract for the AIM module, which gives you TAC support and download the v7 of the AIM-CUE. Should be all you need to upgrade.