RGB color profile will NOT stick

I us X8 for full-color sublimation and laser both have to be RGB. I have set my default color profile to RGB - the page looks just right. When I start a new doc. it still defaults to CMYK. I set the document color default to RGB. When I reopen it on another computer, it's right back to CMYK. As I do a lot of my design and layout at home and then come to the shop for production it is VERY frustrating.