Gnutella Forums - Strange..

This is really wired, and has been happening quite often to me. I am running limewire 4.12.4 and of coarse I like it. But, every onece inawhile, it will just uninstall itself, on its own. Like, I was downlaoding a song, and it did it and when I turn on my computer, I have to re install limewire. Now, it dosnt erase my options I selected.. like (I have the ofline installer on my desktop) it takes about 30 seconds to install, and then everything is the way it used to be.
How do I fix this from uninstalling all the time?
I never experienced this before with another program or anything..