I deleted my bashed patch and cannot generate a new one. "Rebuild patch" option is greyed out as there is no patch to rebuild and I cannot find a "build" option somewhere.
Well there is an active Wrye Flash thread you could have asked in.
Go to your Fallout3 folder and next to the data folder should be a folder named MOPY inside it you will find another folder called extras. In there is an extra bashed patch you can copy out to your data folder.
Barring that you could always extract the bashed patch from the archive WF came in.
Usually searching the forums as primitively as I do gives me LOTS of pages to browse through, so I tried this solution instead. And it WORKED also... YAY!!!