Hi Richard,
I think George is on the right track (albeit I don't know how you "transferred" your copy).
e.g. if you installed from the original disks (or even a download from Adobe), it stands to reason that, even if you de/reactivated the two copies on your computers via their website, the actual software just installed on the new PC may not contain all the ACR updates released since then. So unless you specifically updated it, this is understandable.
That's just my guess, given the limited information regarding the "transfer" method employed that you have provided.
I expect (hope) you'll be able to resolve it.
I'd start by running it and doing the Check for Updates process,
I just found this in my CS6 (or Bridge) under Help > Updates in the menu.
You can find what version ACR you have by clicking Edit > Camera RAW Preferences
(then it is in the pop up window title bar). I have 9.1.1.461
It looks like, because I already have PS CC installed, this may have given me more features, even in my "CS6 Extended", at least there's mention of this in the Adobe Application Manager which appears when I check for updates.
Good luck, Dave