Color confusion

Dear Corel users

Every time I open a new empty document in CorelDRAW 2018 and draw a line or produce other graphics CMYK is chosen as default. I want RGB however (as recommended by Foster Coburn in a video). I am not making graphics for Prepress. It is mostly for online viewing and occasionally output on simple laser printer. I have set Primary Color Mode to RGB via the Default Color Management Settings dialog. The strange thing is that despite my settings graphics are created with CMYK. Then I opened on old file I created a couple of years ago. Inside that file graphics are always created in RGB. The Document Color Settings (under Color Management) are exact the same in the two documents. I am very confused. I hope someone can help me figure out  what is wrong and how to make the RGB settings permanently for every new document! 

Kind regards,

Erik V.