如何在不启用ADB集成的情况下进行调试

Upon issue I posted yesterday, I re-install Android studio 1.5.1 (the previous version was 2.1 beta). I am able to open DDMS to debug correctly because I can instant run the app with the ENABLE ADB INTEGRATION unchecked which has to be checked before. Can anyone has any idea what happened here? why am I able to debug the app without enable ADB integration? Many thanksUpon issue I posted yesterday, I re-install And