Hi, my motherboard died last week but I was able to have .ptg files transferred to my new computer. my Artrage software came with my Wacom but I no longer have the serial nb./key. I'm pretty sure it was version 3.0, which is no longer available. If I purchase the 4.0 upgrade will I be able to access my files? If so, is there any way to get the discount without the serial number? Thanks for any advice!