Editor "floats" after 4.4 install

[Fritz Sonnichsen]

I installed version 4.4 Octave on Windows today.

When I double click on a "*.m" file , Octave comes up along with a 
separate notepad++ session. I cannot run the program from octave. I need 
to resume running octave as I did in the past, connecting the *.m 
program directly with the internal editor. Further I want the editor 
docked in the Octave frame. How does one accomplish this?

Thanks
Fritz