It s part of it, and I cannot skip it.
Accurding to the FAQ https://helpcenter.steinberg.de/hc/en-us/articles/206086264-Cubase-AI-or-Cubase-LE-4-5-6-Registration-Fails
I have uninstalled all Cubase LE versions I have (LE6, LE 5, LE 4), and also the eLicenser.
I tried to reeinstall by intalling eLicenser-Helper, then Cubase LE 4. This installation seemed to succeed.
Then, isntallation of Cubase 5 did not run smoothly. I had to run the isntallation program several times, directly from the Cubase LE 5 windows installer, not from the DVD autorun start center…
Then, I could not install Cubase LE 6, neither 64 nor 32 Bit versions. The installation program did not finish.
So, i tired to run the Cubase LE 6 inatallation program directly as administrator. This seemed to work, but after installation was finished, my desktop was almost empty, only some basic icons and the Cubase LE 6 icon were there.
When I tried to restart windows, I was not able to log into windows. because my windows account was turned into a temporary account.
At this stage, I recovered windows from a backup…
On a different computer (Windows 7) I was able to install all the various Cubase LE version without problems.
I own several copies of various Cubase LE versions, that came with either hardware (audio Interfaces and the like), or bundled with the German “Keys” magazn. So I purchased several copies of the “keys” magazine to have more than one copy of Cubase LE (4, 5,6, …) to install on my computers.