find and open your incomplete folder. Right-click on file and press copy. Go to desired position to save it. Right-click and press paste

This will probably work better if limewire isn't open while you do it, as you often will get a popup saying that the file is in use, if you do it without closing Limewire

After you have copied it you have the choice if you want to continue trying to get the last 1%. If you don't then just delete it from the incomplete folder in the Limewire library