Question about Outlook Express

I gather from reading these emails I did a bad thing today in Outlook for Mac 2011-- I moved 10000 emails from one folder to another. Now my Mac is essentially underpowered as it is stuck trying to "Uploading..." to Exchange. It works at a about 1 email every 3-5 seconds, and all the while it pins my CPU. My Macbook Air fan is about to break under the strain.

Thing is, I seem to be stuck. I cannot stop the process (clicking the little x beside it in the Progress dialog does nothing). Crashing Outlook stops it, but it will restart whenever I reopen Outlook.

Is there ANY way I can kill this process and go back to deleting/moving messages in a more regulated fashion? I can't figure it out.

Thanks to anyone who can help.

PS- I think it is insane that MS doesn't have some sort of a dialog that warns against bulk moves like this, seeing that this is the result.