You're referencing answers to different questions, BAP.
1) You had asked how to Add or Remove a slot. Changing to Expert allows the Add and Remove buttons to appear. That was when you were thinking of deleting the problem WU from its slot.
2) A version update will likely do good by just installing over the old one and doing what it needs to do by downloading a new core if it wants one in order to run the problem WU.
3) Wiping everything is likely not necessary.
We're doing a lot of talking here. Recommend you just get the latest release from the beta page and install it. If it doesn't work as hoped then we can take it from there. It will take all of 5 minutes, likely be just fine, and can not result in lower production than the current zero.
I certainly know about Sandy, hard to turn on the TV without hearing everybody's guess on landfall. Hopefully it's a big zero but all the best if it veers inland. We'll even feel it here on the better side of the Great Lakes. 
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