Ended up using the chat option on the Cronus website to ask for support. Tech knew what he was doing. I, unfortunately, did not.
See, when I unboxed the Cronus and plugged it into the PS3, it didn't work. The Microsoft Wireless Adapter synced to the Evil D-Pad, but the PS3 never saw it. The Unknown USB Device error from the PS3 seemed to be the issue.
So I had used the CronusCFG software to test the device on my laptop, and there's apparently where a new problem developed. They decided to make all changes to dropdowns on the screen, like what button does what job, instantly update to the Cronus device, rather than create a file that gets written to it. There are profiles that are saved to the Cronus, but I'm talking about the default values. So apparently when I tested it, I set it to 360-only output and didn't know this change had been written. Since the single LED dot closest to the PS3 was on, the tech suggested I change the device from Automatic 360/PS3 mode to PS3-only, and this fixed the problem. My Evil D-pad scrolls through the PS3 menus like a champ.
So there's no clue why it failed out of the box. I remember seeing Automatic mode when I first tried testing it. I did push the reset button with a paper clip, but only with no power connected so I don't know if that did anything. Perhaps the auto-update from CronusCFG did activate something that was forgotten at the factory, but I'll never know. Not planning on going back to Automatic mode, since I have no need.
I am confused, though. I swear a video said I needed a wired 360 controller for the job of authorizing Cronus to accept the Wireless Adapter for use on the PS3, but that's not true. Once you get the Cronus happy, it's all plug-and-play. Now, if you want to use a PS3 controller on the 360, THEN you need to authorize the Cronus, and I was told it was every time you turn on the 360, which seems like it would be an annoyance. Although if you consider the PS3 controller important to use on the 360, you are already annoyed so a little more probably won't kill you. The tech said that the fact that my Mad Catz Arcade Gamestick didn't even work on the 360 was an incompatibility issue that may or may not be resolved. Ah, well.
Now I need to make time to prove that all my PS3 gaming issues came from an inferior controller and not an inferior gamer...