Then you should install the old HALion One plug-in on your new PC. You don’t need HALion 5, and you don’t need a license other than Cubase (11). As I said, it works fine for me, see also here:
Cubase 10 and HalionOne - Cubase - Steinberg Forums
I had already posted the link to the Cubase 5.5 ISO file above.
If you open this file with Windows 10, you will find a separate installation folder for HALionOne. It is not necessary to install Cubase 5.5 or any other programs on this ISO file.