I just found out that there is no such thing as Quick Fix 4.2.

The only place online I found it at was Amazon.com and I thought that was sketchy. I ordered over the phone at QuickFix.com and the lady told me it's an error and they've been trying to get Amazon to change it. The newest formula still is 4.0. Apparently Amazon either made a mistake or they're false advertising to get people to buy it...just thought I'd pass that along. Good luck! I'm the same boat