Since upgrading to 4.2.7 I noticed there are several folders that do not appear on my test board listed below but still remain on my live board. Is it safe to delete them now?

cache

converge_local

hooks

interface

ips_kernal

lofiversion

public

Yes, you can remove them, they are 3.4 folders.

Thanks again Rhett !

Thanks for this. I keep finding old 3.4.x files on my live boards, why doesn't the upgrader remove them, to avoid any outdated files that may be risky to leave around?