You may well get the help you need here, but this sort of issue would probably be quicker to resolve with a phone call to the Steinberg/Cubase support line. I would also let the eLicence software have a go at upgrading itself, there should be a Maintenance button of something like that for you to click.
I was able to transfer a soft license Elements 7 to a Cubase SL3 dongle. I inserted the old dongle. I downloaded the latest e-licenser software to update the dongle, then installed but not activated the Cubase. I am not sure what I did next. I must have typed in the activation key. The activation found the dongle so the license has been transferred. It may depend on how old the dongle is. I think the dongle has to be inserted before the activation. I think the big Cubase program updates can only go on a dongled Cubase program.