Hi Leonard, the file seems to load fine for me both on Windows and on Mac. But most of the stuff in the file is hidden, you'll need to use Edit > Hide to show all the hidden stuff if you want to see the bulk of what's taking up the several MB of file size.
Hi Michael, I tried the Edit > Hide...no joy. Opening the Objects list shows "No named objects." I always name the objects in a model. The other files I had this experience with are upwards to 10X the size of "Island." –L
For anyone else that was following this, it had to do with the .3dm files being in a deeply nested folder hierarchy. Seems like there's some limit in Wineskin on how long the directory path can be. This should be another thing fixed in v4 where Wineskin isn't being used anymore.