Geeetech

I get an error if I change fillament size in easyprint. If I start up program size is at 3mm, if I want to change it to 1.75mm there's comming a red "!" with a message "not an integer" And switch it back to 3mm. if I put it to 1.75 program will not go further and "hangs"... Did re-instal, tried it o...