Just download v2.510
Version : 2.510. 2003/1/17
Fixed: In the Environmental setting window, General tab, checking Enable multiplex with... and chosing audio file other than mp1, mp2 or mp3 format would raise an error when starting to encode.
Fixed: In the MPEG setting dialog window, GOP structure tab, when Detect Scene Change and Force picture type setting were both selected, closing the dialog window and re-open it would clear the Force picture type setting checkmark.
Fixed: In the MPEG setting dialog window, System tab, chosing MPEG-1 Video-CD (non-standard) would in fact select the MPEG-1 Video-CD setting.
It works for me.