It looks like the tileset that I uploaded for 2.2 had the collision shapes set for those tiles (my error). I have now corrected it and uploaded it to the forge.
If you want to follow the tutorials exactly, then you'll need to visit StencylForge and download the 2.2 tileset again. However, be aware that existing tiles in your scene will probably disappear, so you'll need to replace them in the scene designer. It should only take a few minutes to do.
Also, in the example file that you provided, you have used the incorrect tiles for the platforms. You have used the tiles in the first row that have earth showing under the grass. The tiles that you need are just grass, and appear in row 9.
Let me know how you get on.