The main problem is that when I open any .m file, a notpad++ file is
opened along with it and editor widow is shown blank. I dont want the
notedpad++ file is to b opened. Pls help me in this regard, I will b
very thankful to You.
Just to clarify: you're trying opening an .m file, through windows explorer, and BOTH octave and notepad++ are opening? the default programs suggestion is good if notepad++ is opening up _instead of_ octave. If both, that's a bit more unusual.
Also, since on windows octave opens with a vbs script, it's not clear to me what will happen if you specify the octave executable directly. Does the exe installer attempt to set .m file association?