Milind,
That widget is a few years old and works on the client side so may not produce the best PDF files. I would recommend using the PDF Document Generation module which is pretty easy to set up and gives you a lot of control over document contents / resolution / etc.
Hope that helps,
Mike
Hi Milind,
Are you creating the File in your Mendix App or are you downloading the File from an another App?
If you are creating the PDF in your app then you can download it easily in a microflow.
https://docs.mendix.com/refguide7/download-file)
Best Regards,