I think that, as with every U2 song, it feels like Bono has a personal message for everyone listening to the song ;-)
But I think the general message of UC is indeed the "release, restart, reboot. You're free to go".
In the book that comes with the deluxe edition Bono says that he wrote the song with a character in mind, which is the same character as the one in Moment ofSurrender. It's a soldier who came back from a mission traumatised and completely lost control over his life, but also took his wife down with him. UCstart at the point where he has hit rock bottom and just at the moment when he's ready to give up on life completely, his cell phone starts talking to him.A computervoice tells him he's free to go. To close the past, remove it from his memory (force-quit and move to trash) and reboot. I love the message ofthis song, (but I still have to get used to the song itself).'
I think the whole album is about being reborn in some way. It can feel that way if you're coming out of a relationship, you have to change all your plansand dreams and start over completely. It's nice to get support from Bono isn't it?