LimeWire did not set up this forum. :) This forum was running before LW even existed. ;) LW is just one of many gnutella programs that has been or is represented at these forums. They do have their own beta forums now.

Did you try replacing the LW 4.18 basic with LW 4.18 Pro?
You're not the only person who has had major problems with LW 5. Some others also cannot run it on their systems.
Also, I was not happy they released LW 5 so early when it was still missing many of LW 4's tools & still had several bugs. And more are being found. ;)