Ray ,thanks for your help I have followed your suggestions and everything now seems in order. When I reinstalled mach3 seems it came with all its own EMX files .I reinstalled the licence so my name is back in the help file.I did put copies on both my home laptop [although it warns against it] ,which just piddle with and my tower unit at the shop which actually drives the machine .
The installation put 5 shorcuts on the desktop, mill, plasma, turn, lazycam and mach3 loader,the latter looks just like mill. Thanks again for your help regards mike hide