Thank you for supplying the invoice screenshot with the detailed information. The vat tax is equivalent to the sales tax that most Americans have to pay now on online purchases. The older Video Essentials I installed does show up in PD20. It is one of the packs installed previously.
It looks like NewBlue updated their installation software even on the Classics vault to make them not compatible with all versions of PD. They already updated the installers on their newer software to make those not compatible with all versions of PD which happened when PD20 came out 2 months ago.
Someone in the FB PDU forum said the same thing about his very recent NB purchases not working but did not supply any detail like you did. This leads one to believe that future NB pack buyers will have the same issue.