The Island has been removed from STK 0.9, but luckily it is available as an add-on.
So I have downloaded the add-on “The Island”, version 1.
So far the track works okay, just like in STK 0.8.1, but there are some graphical glitches in the track. There are some areas with grossly oversized white triangles floating in mid-air. This doesn't look right.
So whoever uploaded this track: Can you please fix it?