AutoCAD 2010 :: Changes In CUI Are Not Being Saved / Applied?

I run the CUI command, and use the command search to find an old macro command that I created a while back.  I edit the macro in the right-hand pane and then click APPLY, and then OK to exit the CUI.  But the changes that I made are not there - when I run the command in AutoCAD, it executes the old version of the macro.

So I tried it again, only this time I exited out of AutoCAD and re-launched.  Still nothing.

This is very strange, because I've been composing and editing macros (attached to toolbar buttons) with CUI for years, and this is the first time I've ever had this problem.  But it is worth noting that this is the first time I've tried to do this in our current version of ACAD, which is 2012 vanilla.