how can you fix so you don't have to click at "[x]No file" if you haven't selected one?

just comment out this line in wakaba.pl:

make_error(S_NOPIC) if(!$parent and !$file and !$nofile);

you may also want to remove this line in futaba_style.pl:

<if $textonly_inp>[<label><input type="checkbox" name="nofile" value="on" /><const S_NOFILE> ]</label></if>