Add functionality to home button?
There is an app in the Google Play Store called Advanced Home Button. Although this app won't allow you to directly configure Home button's single press, this may allow you to replace the double-tap which is configurable.

However, this app does mean replacing your default launcher (in your case, ADW launcher). You, may, though, try it out whatsoever and see if it helps your issue. 

Edit: There have been  many negative responses on the app saying the app causes issues with the home button. So you need to be careful while installing such an app.