Would you really instruct someone to “install but don’t yet launch DEVONthink 4 yet” [sic]?
Doesn’t quite fit with your answer to Charles56’s question “Are DT3 users expected to install DT4 alongside DT3?”, viz: “No … at a minimum, delete the DEVONthink 3 application and reboot the machine”.
Of course, no way that was suggested merely to justify the confusing implication in the guide notes (the “web stuff”).