Open program/js/app.js
Find the Line
this.mimetypes = new Array('text/plain', 'text/html', 'text/xml',
'image/jpeg', 'image/gif', 'image/png',
'application/x-javascript', 'application/pdf',
'application/x-shockwave-flash');
Delete:
'application/pdf',
Well opens with a download PDF's window
Bye Michael