Why does it show CUbase ai 11 in "My Products" in The download assistant?

Yes I actually had found out this by reading this Error message: Some content could not be loaded… Missing/expired (trial) licenses – Steinberg Support
and gone into the library which was not on my desktop but somewhere in the startmenu. All the other files or folders are on the desktop.

SO I guess I should delete this VST preset FLux thing which is of an older date: ALthough I thought I had uninstalled everything? I have had it from earlier, probably since the ai 9,5 version. Or should I upgrade it? I think if it is not in the list of programs/products under the Cubase ai 11, it probably means I should delete it.

One other question: DO You guys place all the programdata on your Operative system Disk c: or on an alternative disk d:? I have a rather small SSD harddisk but a one tetrabyte big D: drive, and would like to keep the C: as empty as possible. Or would placing some Steinberg data or apps affect the recording quality or speed, therefore delay etc? THe programs I assume ought to be on c: or ?