First of all, move your coins. Now that you've done that download "electron" which is a fork of electrum. Import the private key of the address that had a bitcoin balance as of Aug first. Send those bitcoin cash wherever you want and you're good to go!
Like I said, I'm going with Bitcoin Classic unless someone knows why I shouldn't. But I suppose this advice still applies, "First of all, move your coins". But why, may I ask? Is that just a "be on the safe side" kind of thing? Or is this a critical step for some reason I'm not grasping?