easiest thing to do with the two incomplete folders would be to Quit LimeWire, just copy the one you don't want to another location, and move the one you want to try to the proper location. You can also set the option for the number of days to keep incompletes to more than 7 days. Don't try moving them when LimeWire is running, of course.

The wishlist just saves a search tab as a download. Click on any search tab and hit the wishlist button.

Cheers