seek XML, 0, 0;

##</code><code>##

use strict;
use warnings;
use Tie::File;

my $filename = ...;

tie my @array, 'Tie::File', $filename
    or die "Cannot tie file '$filename' to array: $!";

for my $line (@array)
{
    my $newline = $line;    # Make a copy

    while ($line =~ / Name=(.*?) \s+ Password=(.*?) (?:\s+|$) /gx)
    {
        my $name     = $1;
        my $password = $2;
        print "Enter the plain text password for $name, ",
              "password is currently '$password'\n";

        chomp(my $newpass = <>);
        print "You will now swap $password for Password='$newpass'\n";
        print "Continue? (y/n)\n";
        chomp(my $answer  = <>);

        # Change the copy

        $newline =~ s{Password=\Q$password\E}{Password=$newpass}
            if $answer =~ /y/i;
    }

    $line = $newline;       # Update this line in the file
}

untie @array
    or die "Cannot untie file '$filename': $!";