Illustrator :: Settings When Opening A Document?

When I open a document that I've worked on previously, Illustrator seems to re-set its tools - presumably to default settings.  For example the pen tool fill is white, the stroke is black, the point is......etc.
 
It's frustrating to have to change these back to the settings that I am currently using for this document.
 
This also seems to apply to the windows down the right hand side that seem to open in default as opposed to how I last left them when I saved and closed Illustrator.
 
I'd sort of assumed that Illustrator would 'remember' my previous settings etc and open in that way.  Is there a way of opening with the same, previous settings?