解決方法：I encountered the same problem and solved it after a bit of tinkering...steps would be:
1.goto "Menu"->Settings ->"Compiler and Debugger" -> [It will open a new Tab ].->
2.In this tab,you have listings like...Compiler flags,Linker settings,Search subdirectories,.next to that is ">" button,click on the ">" button 2-3 times,till you find "Toolchain executables" in same line.
3.In this window,set "compiler settings" to which ever directories your compiler is installed.
4.For varification,goto lower section of tab-menu and click on location button for gcc or g++,it shoulddirectly open a new browser window and gcc /g++ is selected.