Hi Orca,
Thanks for you suggestions! TodoPaper is incredibly flexible and you can do these two already.
First, to hide your done tasks, there is an option in the View->Tasks menu called "Toggle Done Tasks". This will toggle between hiding and showing your done tasks.
Also, there is the ability for "boolean" searching. You can use AND, OR, or NOT.
So, for a search for tasks that are not done just use this:
NOT @done
You could also perform a search like this:
@today OR @tomorrow NOT @done
I hope this helps! Feel free to email me if you have any more questions (jordan@widefido.com)
Best,
Jordan