I've had no problems re-installing the C18 compiler after the 60 days, I don't even have to "uninstall" the previous version, simply write on top of it.... It even leaves my other additional libraries in place rather than wiping out the folders.... What version of the demo are you using?....I've got 2.20ad. DD -- http://www.piclist.com hint: PICList Posts must start with ONE topic: [PIC]:,[SX]:,[AVR]: ->uP ONLY! [EE]:,[OT]: ->Other [BUY]:,[AD]: ->Ads