## 1. You may turn off this menu selection: ![enter image description here][1] (Or uncheck `Debugger` to turn off the entire apparatus.) ## 2. The tools are:  ---------- ### Version 10 bugs *Mathematica* 10 (and later) seems to have some strange problems regarding the debugger tools window. In 10.0 and 10.1 under Windows once I turn on the debugger I experience the window persisting even after the menu is unchecked; it reappears when I close a Notebook window. I suspect this has to do with the change to individual window menus rather than a menu bar. Fortunately in my case restarting *Mathematica* removes the tools window, however other people have experienced it persisting between sessions; see: - https://mathematica.stackexchange.com/q/56152/121 - https://mathematica.stackexchange.com/q/76473/121 - https://mathematica.stackexchange.com/q/83471/121 - https://mathematica.stackexchange.com/q/125262/121 [1]: https://i.sstatic.net/2afXh.png