Theme lost – recoverable?

[Topic decapped – please do not “yell” here]

So wordpress just prompted me to update my hazen theme from what I believe was 1.1.0 to 2.4.1. Well, I foolishly obliged, and now my website is entirely messed up. I lost all the custom formatting I did in the theme editor, and the updated theme looks nothing like the old version. Is there any way to recover this? Any help would be greatly appreciated! …especially considering how much time it took to get everything the way I had it!