I guess you had CSP installed before, right? Now, uninstall your CSP Ex again, but before installing CSP Ex, you need to delete or move the CELSYS folder, which in my case it's located in Documents. See>>5032670
That's what fucked up your Ex installation. It thinks you still have the Pro version somehow. Once you made sure there's no CELSYS folder on your pc, install the Ex from start. Should fix your problem.