What can I do regarding a CCW after an expungement?

Over 40 years ago, I got in trouble and was found not guilty by reason of insanity. I got my records legally expunged and went on to become a successful law enforcement officer for ten years with the Department of Corrections. During that time, I was authorized to carry and use firearms. Last Saturday, I successfully completed a CCW Class. I received full paperwork and documents to apply to the county sheriff department for my license to carry a concealed weapon to protect myself and my family. According to the unsigned application to apply for a CCW License, it specifically ask, if I have ever been adjudged insane or found not guilty by reason of insanity. Since my records were legally expunged and I have been a law enforcement officer (now retired) for ten years, must I disclose my past on this application to carry a concealed weapon? The application clearly states that failure to answer these questions truthfully is a felony, punishable by imprisonment and fines. I feel like I am between a rock and a hard place. Please give me some direction or should I just give up? I don't want to go to prison and yet, things are so bad here that I feel compelled to exercise my second amendment rights bear arms! There never has been a felony conviction on my record.