Once you install the latest version, 4.12.3, you can not get the video preview or Help links functions to work again by installing the previous or earlier versions. Seems that 4.12.3 does something to the system that returning to earlier versions will not correct. When I reinstalled the earlier versions and started Limewire, it would initially show the earlier version number and then quickly show the 4.12.3 screen again. The program would try to function as an earlier version but be overridden by the latest. Major problem introduced by Limewire in their latest release. Hope they come up with a fix quickly.