I do not know how to short though, and quite frankly don't want to.
I was on the understanding this would be a good investment, but it seems to be going down each time I look at it.
It's a long term investment, no one expected it to shoot up in the intermediate aftermath. (Everyone who was interested could have bought at ICO price for the last 2 weeks, why would there be huge demand at higher prices once it's finished?) If you are looking for something short-term then sell and move on to something else.