Access violation at address ... in module 'vspdfeditor170.bpl'

In case of Expert PDF reporting the above error, please close the software and navigate to Printers and Scanners in Control Panel. Where set any printer as default.

After important or major Windows update default printer may be deselected on some computer configurations. 

Now start Expert PDF and continue using it as normal. 

If you need further assistance please submit new support request here.