Last year, in November I purchased the PDF Converter. Now, I need to re-activate the software. What should I do?
You will need the serial number that was provided to you when you purchased it. I recommend downloading the trial version, then use the serial number to activate the application. It's the easiest and most convenient way.
Download trial: http://pdfonline.com/products/allpdf-converter/usage.htm
If you have additional questions, contact the developers and they should provide further details: http://www.pdfonline.com/corporate/contact.htm