Can I restore a previous theme version (if I have on another site)?

I have two sites I am developing using the Audioman Free Theme (I will buy the paid version but I am still learning how to use Wordpress). I upgraded one site to 2.0.7 - great. Didn't get around to the other one yet. Happened to go onto the site on my phone and the site is messed up that I upgraded. The old 2.0.3 is still perfect. Is there a way I can go back to 2.0.3 on the upgraded site? Can I download from Catch anywhere or can I pull a foloder out of my other site that isn't upgraded yet? I do not want to worry about this fix now. I am spending enough time getting the Wordpress knowledge down. Thank you.