Hi, @harunsivasli. Welcome to the Cayenne Community.
Are you dragging the parent-level device (like the Pi or Arduino itself -- not the sensors connected to it) into the 'IF' box on your Win7/Chrome setup? That should work. Once you drag it in, you can pick from each of the attached sensors/actuators in a drop down menu.
We do plan to allow you to drag the sensors and actuators directly in a future update.
Also, for anyone who finds this thread based on it's title -- we should be supporting the Edge Browser on Win10 OK now. The original post was from more than a year ago. Let me know if you run into any trouble with it.