This issue is related to the installation.
You can choose between "install for all users" and single user installation during the installation process.
I think you did the installation for Halion 5 for "all" users but didn`t do that for Cubase.
Depending on which installation procedure you have choosen, the content will be saved in differen locations.
Please have a look at these directories:
Please make sure that you got in both folders the same content.
Please keep in mind that booth directories are hidden.
:?: How to see hidden files: