It's not clear to me why you downloaded and installed even a release candidate (i. e. RC2) of an old release (13.12)
if you could have had a real release version of it (without the RCx). Also you downloaded an installer without a
bundled compiler which is astonishing to me when you seem to start with it.
From your screen shot I guess you're using a Windows 7. The installer should have added some start menu entries
that should be usable to start Code::Blocks. Why it's not working at all on your machine? I don't know.
I think you should uninstall all that with the uninstaller (found in the installation directory).
Fortunately the next release (15.12) will be available soon so there is a release candidate RC1 of a full installer with a
bundled MinGW GCC compiler. The download can be found here:
http://sourceforge.net/projects/codeblocks/files/Binaries/15.12-RC1/. Download codeblocks-15.12mingw-setup-RC1.exe that includes a compiler.
Install that and then we'll see how it goes.
Greets,
pirx67
PS.: I don't know anything about Dev-C++ and the compiler it uses.