If i left click on codeblocks it still does not show that pop-up. I have to right click or to minimize and expand again so that i can see the pop up. I took a look in Settings->Enviroment->General Settins and the option "Check for externally modified files" is checked. What should I do? Should I reinstall Codeblocks manually, not from Ubuntu Software Center (if so, could anybody show me a decent tutorial, because I tried some and couldn't do it. Thank you in advance!