Hi,
here https://support.native-instruments.com/hc/en-us/articles/12972701353757-Notes-about-Auto-Migration-of-Kontakt-Versions-in-DAW-Projects is stated that there is an auto-migration feature for Kontakt, so that one can delete an old version, and a newer version will automatically be used in Cubase 12+.
Question: does it work also for Kontakt Player? I have tried to remove Kontakt PLayer 7, while having Kontakt Player 8 installed in Cubase 13 Pro and Cubase 15 Pro, and it simply did not work: Cubase has complained that Kontakt Player 7 is not there and cannot proceed.
P. S. I have restarted my computer after deleting Kontakt Player 7 according to the instructions in Native Instruments (where is the installation script, btw, NI?).