Cannot upgrade from Pro 10 to 10.5 - eLicenser issue

All versions of eLCC and Cubase Pro are up to date. Have downloaded Pro 10.5 via Download Assistant. Installed 10.5 but eLCC will not allow licence to be upgraded via current activation code. I can only use 10.5 by starting 24 hour version of 10.0.
If there is a new activation code needed for 10.5 upgrade, there is nothing on Download Assistant or via my Steinberg account to say so, or how to get it.
Starting 10.5 Pro gives a dialogue box saying …
“You have not activated your Cubase 10 Pro license permanently yet. You may use it for another 24 hours 30 min. Please activate the permanent licence in the eLicenser Control Center.”
I can then choose to either, “Start Cubase 10 Pro”, “Start Cubase Artist 10” or “Start License Activation”
Starting the License Activation and using the appropriate activation code from the purchase confirmation e-mail shows a positive identification of Cubase Pro 10 with a “Continue” button. Clicking “Continue” brings up an ELCC error box saying, “No lIcense to Upgrade Selectable”.

Any suggestions please??


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