Cubase 5 used the system, which required either a physical USB-eLicenser (a "dongle") or a Soft-eLicenser tied to a specific hard drive.
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Since Cubase 5 is a sunsetted product, Steinberg has transitioned to a new "Steinberg Licensing" system that no longer uses the eLicenser for modern versions (Cubase 12 and later). Cubase 5 used the system, which required either