How to identify Logic Express 7 retail vs. academic.

I wondered if there is a definitive way of determining whether a copy of Logic Express 7 is the ugradeable "retail" version or the academic version. My copy says "retail" on the CD package and does not have academic on the splash screen My local apple store says they cannot tell unless I have the price from the original invoice (which is long lost). I am looking to upgrade to Logic Studio.