OK so 14.8 version is online once again.
Not much to see in that version but one interesting feature : fences builder.
So you can create any fence, wall, rails, wall and so on all around the track.
This version also answer to the upper bug with .bin names and to track length info.
Here is the log:
v14.8 (july 17th 2005)
New: Fences Builder
New: Track details infos
Fixed: .bin files were saved as melbourne2001 when both .dat and .gp4 files were opened
Fixed: bad behaviour when using Move+rotate mode at vertex level with .gp4 files
and the screenshot:
And I also think that now I wrote the code for fences, I will be able to directly convert .dat to .gp4 objects without ZM needs anymore