Press F1 after you are ingame and you have opened your inventory once. You'll hear a "trainer activated" sound then you can start using the options and the editor.
Cool thanks, that was the problem.
For future versions you might want to add that step to the FAQ or trainer notes, I didn't see anything anywhere telling me I needed to hit F1 to turn it on.
does it work with the 177.1 version?
it does. Also in 177.2. Tested it myself.