Farms avatastic theme pack2

Hi!

I have searched, without finding the answer...

Need help with a stupid question about Farms avatastic. I have uploaded Farms earlier theme pack for a couple of months ago and now I want to change them with this new theme pack. The question is: if I upload the new and modified themes (with support for the new avatars widget etc.) does this reflect directly on the bloggers themes or do I have to do something to update them? This wasn´t a good and clear question, I give you an example.

If I upload the new "Almost spring" theme does the old "Almost spring" theme update directly or do I have to do something to make the new avatars widget to work?

Hope you understand my bad english...

Regards Richard