Preferences are being saved

When I open pdf documents they appear yellow. 

I found solution to do to edit, prefrences, change view to windows 

and document is now back to being white. 

Then i reopen document and it is back to yellow. 

I changed prefrences with document open and document closed (just adobe opened) 

Had adobe open as administartor and still does not save when i reopen. 

btw i have latest adobe version. 

and 

I deleted the entire DC folder from %APPDATA%\Adobe\Acrobat and rebooted the pc. To forced it to purge corrupted settings for Adobe and made Adobe rebuild the settings from scratch.

still prefrences are not saved after i reopen documents