The other day, I received a PDF file which was password protected. I also received the password of the file.Now, when I open this PDF file, it asks to enter the password first. The default document viewer gives the option to save the password to avoid entering it again and again. However, the PDF will still be required if the file is to be read on some other device or if I want to transfer the file to my Kindle.Thankfully, it is fairly easy to 'remove' password from a...