I just downloaded LR6 upgrade edition. The website said that LR 4 (I have LR4.4 installed on my computer) was eligable for upgrade. I gave the new license key and was told that the upgrade program did not find an eligable copy of LR on my computer. I was then asked for the serial number of the LR4 copy, which I supplied, and am now being told that "the serial number is not for a qualifying product. Please try anther." I purchased this copy of LR4 from Newegg.com. I have a receipt and the license. Purchase date Feb. 20, 2013. Can someone let me know what error is being made?