I don't presently have a way of preserving folder times on data copying operations. I can get the old folder time using stat but utime does not affect folders, at least not in Windows. (Nor does it say it does in the docs, I'm not calling this a bug.)

Are you sure about that?

#!/usr/bin/perl --
use strict; 
use warnings;
use Path::Tiny qw/ path /;
my $g = path( 'goner' );
$g->remove_tree;
$g->mkpath;
print "$_ ", scalar( gmtime( $g->stat->$_)), "\n" for qw/ ctime mtime 
+atime /;
sleep 12;
$g->touch;
print "$_ ", scalar( gmtime( $g->stat->$_)), "\n" for qw/ ctime mtime 
+atime /;
$g->remove_tree;
__END__
$ perl gonerbegone.pl
ctime Tue Sep 15 01:04:33 2015
mtime Tue Sep 15 01:04:33 2015
atime Tue Sep 15 01:04:33 2015
ctime Tue Sep 15 01:04:33 2015
mtime Tue Sep 15 01:04:45 2015
atime Tue Sep 15 01:04:45 2015
[download]

You can always "go native" with Win32API::File

As a curiosity, this http://perl5.git.perl.org/perl.git?a=search&h=HEAD&st=grep&s=utime lead to http://grep.cpan.me/?q=SetFileTime to find
Win32::UTCFileTime - Get/set UTC file times with stat/utime on Win32
Win32API::File::Time - Set file times, even on open or readonly files.

FWIW, its worth remembering there is Win32::Unicode