Whilst I didn't have the serial number problem, I certainly have other 'issues' with this software. Bluntly, this software is appalling. It has great difficulty converting 'Word' files to .pdf. I regularly as part of my work convert word documents to .pdf, with this software anything above 3 pages is a real no, no. It converts the first page but all others are blank. Images? forget it. HTML files? only if you are prepared to re-start the program after every conversion. It puts little menus in some programs, don't know why they rarely work.
All in all a waste of money.