Just uninstall the v11. Add/Remove programs on Windows, or Applications . ArchiCAD 11 > Uninstall.AC > uninstaller on Mac.
The uninstaller may ask you if you want the wibu driver deleted; just say no. If it does not ask, and the driver is deleted, just reinstall it from the installation disk or download from the graphisoft web site.
One of the forum moderators
AC 28 USA and earlier • macOS Sequoia 15.2, MacBook Pro M2 Max 12CPU/30GPU cores, 32GB