First: Try the online appeal option and submit your court documents showing the 5 year period has expired. If the system will not let you do that then email an explanation and a copy of the documents to: CCL_Appeals@isp.state.il.us
Since the denial was 2+ years ago, it's possible they will need to clear your application from the system and you reapply. But I would try the online appeal first and see if this can be done without having to pay the $150 fee again.
I don't want to muddy up this thread too much. When does the 5 year period lapse? From when I was charged, or when the case was officially closed?
I was charged in June of 2011, but the case wasn't officially marked closed in till October 2013. The charges were amended in 2012.