I see from your post at PAR::Packer: pp with addfile option: where are the files? that you have a Tk GUI application. If you use the getOpenFile gizmo, then you get a display that looks just like Windows Explorer and user can navigate to where they want.

snip...
my @types =
       (["log files", [qw/.txt .log/]],
        ["All files",        '*'],
       );
$ml_filepath = $mw->getOpenFile(-filetypes => \@types) or return;
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