CMYK Colour Palette looks same as RGB in Corel 17

The problem occurred after Windows automatically updated.

My Corel page turned pale yellow along with White on CMYK colour palette also showing pale yellow.

I followed one YouTube help...

Went to Default Colour Management Settings - Colour Conversion Settings - Colour Change - and made it 'None' - pressed OK

The result was - Pale yellow changed to white but at the same time - CMYK colour palette started showing bright colours like that of RGB colour palette.

How to change it to original CMYK colour palette. I checked Windows colour palette - it shows CMYK palette only but colours are not matching.