Wim,

Please download Dino's Lighting Options dialog script here: http://moi3d.com/forum/index.php?webtag=MOI&msg=5222.48

Place this file inside of MoI's "UI" folder and overwrite the original one.

See this link for the full discussion: http://moi3d.com/forum/messages.php?webtag=MOI&msg=5222.1