Notepad++: Loading/saving Sessions?

I have, like and use Notepad++ for all my C code and think this is a good program. However, every time I open a new instance of Notepad++, I get the same files as when I close it last. I like that feature and don't want to get rid of it. However, I'd like to group code together in settings, i.e. all the files for a particular program in one group, and open the specific group upon execution of Notepad++. Is this possible? If so, how do I do it?

 

https://superuser.com/questions/459705/open-two-instances-of-notepad

Check this out, I hope this helps

 

I thank you for the help, but that's not what I wanted. I don't want a new instance of Notepad++: I want to open Notepad++ with a given predefined sets of files in the first instance.