Having the same problem and have been looking for a resolution for over a week and support still hasn't replied! I feel it's a MAJOR bug in 4.14.x but can't get the response necessary to repair. I too have tried every single suggestion on getting 4.14.8 to work and none of them resolve the issue!

If you still have your 4.12 installer saved somewhere, I would suggest reinstalling it and using that until Limewire decides to fix this!