[Silver Knight]

It's like GraalShop if you have ever used it.
When saving you need to type in the extension into the filename.
So you would check the Save box, then as your filename put: name.gmap
Then it will actually generate the levels.
To get the terrain to show, open a level and use the loadmap command like such:
loadmap name.gmap;
Make sure and add a tiledef so you can actually see the stuff correctly.