Hello,
I just installed nu-coder on a Windows XP 32 bit and tried to run it from the command line and got this error:

Fatal error: Unexpected argument specified (software)

I had tried to run this:

nu-coder.exe -f c:\program files\apache software foundation\apache2.2\htdocs\myproject\myfile.php c:\myfile.php.enc

I tried changing the case of the directories and that didn't help. Any ideas as to what's causing this error?

Thank you,
-C

You forgot to quote path containing spaces
Non-quoted spaces in the command line are delimiters of the arguments.
Correct line would be
nu-coder.exe -f "c:\program files\apache software foundation\apache2.2\htdocs\myproject\myfile.php" c:\myfile.php.enc