The CD is a version that supports the drive, and also places a key for that drive in the registry.
If you extract that key, from the registry, or it's reported to be in file Nbdy5.stp on the CD, then you can at a later date, simply install the latest download and register with that key.
The above is a BUNDLE ver - a "true OEM" has a PRINTED KEYSLIP, or on the inlay, and will work with OEM restrictions (one drive, no crossfade, no multimounter) with ANY drive.
It appears that they do offer an upgrade to "full registered" for a cheaper price than just registering the download.
Of course, it would be fair to comment that KEYGENS EXIST, and if you want to do battle with blacklisting etc., you can find them elsewhere (not on this forum)
Any additional coasters are your problem!