Unless you're in a starved state and haven't eaten anything solid for 24 hours, or have just somehow depleted ALL the glycogen in your body (you'd be dead) chances are you have more than enough amino acids in your gut being digested to assist in repair, and enough carbohydrates to prevent immediate catabolism.
Most important thing to get in is a small amount of simple carbohydrates to bring your blood sugar back up quickly. You'll feel better. But other than that, the post-workout shake is one of the biggest pieces of marketing hype ever thrown out by supp companies.
This is not to say they're useless for endurance athletes, bodybuilders or strength athletes who are cutting weight, etc... nor is it to say that electrolyte/carb recovery drinks are worthless.
But don't worry about the silly anabolic window. It's not an window. It's a god damn barn door that you can fit a truck through, and it's always open.
And maltodextrin... has too many different structures depending on the starch it's derived from, but essentially they are all processed quickly and easily by the gut, quickly stripped down into various simple sugars for processing. Of course, there are issues regarding malto versus dextrose concentrations in sports drinks for dehydrated athletes (osmolality issues, etc.), but those are nothing to worry about unless you're taking in your malto in a dehydrated, critical state.
So, essentially, there's no difference between using malto and using dextrose.