I bought Fujitsu ScanSnap ix500; Acrobat DC serial number is supplied with it; serial number invalid
The scanner came with a serial number for Acrobat DC. However, after downloading, and installing, and typing in the serial number, I get the message "Please enter a valid serial number." I have triple-checked the serial number; the serial number I have typed in is what is printed on the sheet. Pleas help.

