I would honestly say that if you scored about as well as your practice tests, and then proceeded to not study very much since then that it would be in your best interests to NOT take the test. Here are a few reasons why:
1. You already scored about as well as your prep tests indicate.
2. Since you haven't studied much since June, it's more likely that your score will actually DROP if you take it in September.
3. If you're content with that score, then it may not be worth the additional stress and involvement that enduring an LSAT requires.
The only caveat may be if you truly bombed the June '07 exam and did significantly worse than your prep tests indicate, OR you took the time to devote yourself to studying and raised your score on practice tests since then.