Once you've done the click editing, you'll need to amplify the remaining part. Constant amplification is no good as you'll still have the gradual fade.
Not familiar with Soundforge either (I know Cooledit can do this, so I guess it'll work) , but what you want to do is something like an amplification that starts off at say 300% (this is a guess, based on what the wave form looks like above) and gradually increases, ending up at say 450%. Keep playing around so that it looks, and sounds the same as the wave form before the UA5 died.
Good luck.