I could swear that I've seen this problem posted before...

At any rate, if you modify the call by removing the brackets like so it will work:

StartCapture(  
                twigs   => {filter => $filterTwig,  capture => $captur
+eTwig},
                hashes  => {filter => %filterHash,  capture => %captur
+eHash},
                files   => {filter => 'filter.txt', capture => 'captur
+e.txt'}, 
                results => 'c:/temp.txt'
               
);
[download]

Result:

perl www.pl
results => c:/temp.txt
C:\Temp>
[download]

It is important to use Data::Dumper or the like to analyze things that are being passed when you are doing things like this. For instance, how do you know you want the entire %captureDefaultHash, rather than just a bunch of elements in it?