I do not get a dialogbox, I only get the second MainWindow you create. In my console I see 
Tk::Error: bad file type "ARRAY(0x22619c)", should be "typeName {exten
+sion ?extensions ...?} ?{macType ?macTypes ...?}?"  at site/lib/Tk.pm
+ line 337.

[download]
filetypes wants two or more, and $open_file_types has only one 
my $open_file_types = [ ['NZB Files', '.nzb'] , []];

[download]
Instead of sub { File_Import() }, you want \&File_Import, or  [ \&File_Import, $mw], or 
$file->command(
  -label       => "Import",
  -accelerator => 'Ctrl-i',
  -underline   => 0,
  -command     => [
    sub {
      my ( $mw, $file_open_dir ) = @_;
      my $nzb_file = $mw->getOpenFile(
        -title            => "Select NZB File",
        -initialdir       => $file_open_dir,
        -filetypes        => [ [ 'NZB Files', '.nzb' ], [] ],
        -defaultextension => '.nzb'
      );
      print qq{You chose to open "$nzb_file"\n} if $nzb_file;
    },
    $mw,
    $file_open_dir
  ],
);

[download]

In reply to Re: Tk::FBox getOpenFile Dialog Box stays empty by Anonymous Monk
in thread Tk::FBox getOpenFile Dialog Box stays empty by Kalisto

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