I downloaded LimeWire 4.12 and everything was fine. Maybe a month later when I went to open it the green box came up and said "loading messages" and wouldn't go away unless I turned off my computer. Just after the green box pops up an error message pops up and says "Your save directory is not valid. It may have been deleted, installed incorrectly, or you may not have permission to write to it, or another problem. Please choose a different directory." Does anyone have any idea what the problem is and how to fix it?
Thanks!

sounds like you deleted/moved your save folder...

what you need to do is remember where it was (hint: there is also a folder named 'Incomplete' in the same directory as your save folder was...you also need to remember exactly what its name was..then you have to make a new folder in the same directory and name it exactly the same way..

above advice is assuming that you have indeed done something with your saved folder...I've done it, and the above advice is the only way that I've ever been able to solve it...