Acronis software

When I run the WD version of Acronis True Image there is a note on the bottom line:

“This product edition has limited functionality.  Get full version”

When I click the link I am taken to a WD- branded upgrade page on the Acronis website which appears to say I can upgrade for $29.99, but when I try to upgrade it tells me that it requires a serial number form an earlier version. Am I entitled to a discounted upgrade because I bought a WD hard drive?