There's nothing in your incomplete folder b/c you've chosen a different location to save your files. Search your computer for the older location you saved your files & your older incomplete folder are. They will both be at the same directory level. eg: /Users/your_username ... if that was where your older save folder was then that's where your older incomplete folder will be. So reset the save location to where it was before.

I don't know which version of Mac OSX you have but might I suggest you reinstall Java using the standalone Java installer. See Fixes for LW (click on link) You haven't given us any clue as to which OSX version you're using.