Running app on Qt simulator gives an error 'Cannot open file myapp.exe'
Why doesn't Qt emulator close previous build automatically?. In order to run new build I have to click explicitly quit button on Application tab in Qt simulator. This is so tedious.
You could add a custom build step for that, or simply hit the "stop" button.
Qt Creator does not stop running applications when clicking on the run button to allow users to test several apps working together. This is essential when e.g. working on a client/server project, or just to see how your app handles getting started repeatedly:-)