You may want to kill the app from the recents list. Sometimes it stays connected, and you won't be able to use the PC version. Another option if you are only using the Local Network is to just turn off wifi on your phone. To kill the app long press home, or click the recents icon, and swipe the app away. I am unsure how to also remove the app from recents using adobe air as that would solve this issue the best way. The fact that the PC app doesn't work until aRST tells me that your android app is still running in the background.
Ultimately I want to stop the app from staying connected while in the list view. It is completely unnecessary. Andrew should have just pulled some registers to check the status every minute or so, then close the connection and then latch on once they click View.
The best practice I think most people should use on their android phones is to enable developer options by going to settings->about phone and clicking on Build Number until it tells them they are a developer. Then press back once, now you should have developer options. In there you can enable long pressing the back button to kill apps, and set background processes to none. This really saves battery and keeps apps from staying open in the background.