When I open CDPaint RGB White appears yellowish. However, when I open CDDraw RGB White is white and when I then select Edit Bitmap from Draw and CDPaint opens, now RGB White is true white.
I've selected RGB profiles for the default and document profiles. I've also selected the North American Prepress presets. I running Windows Vista with a high quality Samsung flat screen.
How can CDPaint White look yellowish when Paint is opened from the desktop but display as true white when opened from CDDraw? When the two instances of Paint are open side by side on the desktop and displaying the same image, the same colors display differently.
Usually white color appearing yellowish is caused by faulty display color profile, you would need to remove this color profile from OS color management settings, read Q&A section at page 28 or Designer's Color Management Guide on how to accomplish that:
http://community.coreldraw.com/wikis/howto/designer-s-guide-to-color-management.aspx
Not sure this is your situation though - faulty display color profile affects both Draw and PhotoPaint. In your case the problem might be because you have modified default CM settings in PP to use incorrect RGB color profile. Make sure to revert to Corel's factory default CM settings first and examine whether your previous CM settings made sense.
Gennady