An update has been placed online to correct the startup problem.
A quick way to get it is to delete the file “My DocumentLBZ ALPHA Game Dataenginescb9_X.exe”
Then start LBZ like you normally would and let it update.
This update also contains an experimental new feature: Late joining.
In network games, players can come and go as they please, the host will keep on running.
Also, 2 players can play already while waiting for a 3rd or 4th to join.