Hi Michael - Good question! I'd like to know too. My laptop shows an iFlyGPSData folder on both my c:/ drive and my d:/ drive. Both of these folders are on the root of either drive. And, they both contain the same data - i.e. - Sectional Charts, TAC's, data bases, etc. I would like to get rid of one of these folders but if I delete either one, iFlyGPS will not start up. I download all 48 states so I could save around 6GB if I could delete one of these folders. So, how about it, AP? Is there a way to run iFlyGPS without the dupicate folder? - Jim Williams