This seems like a good feature request. A user asked “How can I tell what SKU I’m using?”. Unfortunately, the Help >> About pop-up doesn’t say.
I suggest we add this information.
The only way I know of at the moment to see what SKU a customer is using is to look for the Tools >> Administrater >> Log Reader. That way I can tell they’re at least Xpert Edition. I guess I could also check to see if they have the SQL Optimizer feature. But that’s a lot of work and very counter-intuitive.