Can not create source file.

[Crux]

I want to add a source file but every time I try to do so it ends up in the folder called "Others". Any suggestions to what I could be doing wrong?

[oBFusCATed]

What source file (the extension)?

[Crux]

.cpp

The strange thing is that I managed to do it yesterday in the exact same way. But today I added a blank file in the Others folder and now it is placing all new files I create in that folder.

[Jenna]

You might have accidently deleted the appropriate extensions from the filetypes list.
To check this, right-click on your project (in the management pane), choose "Project tree -> Edit file types & categories" and check the content of the category "Sources".

The easiest way to fix this would be to remove the default.conf file from ~/.codeblocks on linux or %APPDATA%\codeblocks on windows.