FYI - if you update your FW your plain vanilla Catalyst will magically BECOME A CX! I did it to my Catalyst - it's GREAT!
But, if for some unfathomable reason you don't WANT a better, more powerful Catalyst, FOR FREE, below is from the original Catalyst Pilot's Guide:
1. Press the REVERB button to enable the Reverb 2. Press again to switch the Reverb off. 3. Like the EFFECTS, press and hold the REVERB button for two seconds to enter reverb selection mode. The AMP SELECTOR encoder LED ring will dim, and you can use the SELECTOR to scroll through the six different reverbs. Press the REVERB button again to exit selection mode. Remember to press and hold CH A or B to save your reverb settings to that preset.
If the above doesn't work and a factory reset doesn't fix it, open a support ticket.