hi j-kut, what i was meant to say is, i only have CrossDJ demo 1.7.0 version & need to upgrade to 1.7.1 for the software to be compatible with my DDJ Ergo, i cant input a serial number because i haven't a purchased copy, i want to be able to try out my controller with the demo version first before purchasing the full version, hope that helps in return for some advice

Ed