This quote by Dick Higgins is from Allen Bukoff's Fluxus Portal site at http://www.fluxus.org/.
Fluxus means change among other things. The Fluxus of 1992 is not the Fluxus of 1962 and if it pretends to be - then it is fake. The real Fluxus moves out from its old center into many directions, and the paths are not easy to recognize without lining up new pieces, middle pieces and old pieces together.
Higgins seems to infer that Fluxus is both dead AND alive. Of course his argument could also be restated as, "The Fluxus of 1972 was not the Fluxus of 1962", or for that matter that the "Fluxus of 1963 was not the Fluxus of 1962" - so it would be hard to conclude that Higgins had the final word on the matter.