Using the latest beta, the workaround from the wiki,

\setuppagenumbering[alternative=doublesided]

\setupsectionblock[frontpart][page=no]
\setupsectionblock[bodypart][page=no]
\setupsectionblock[appendix][page=no]
\setupsectionblock[backpart][page=no]

\starttext
\startbodymatter% or backmatter etc.
After this page, there is another empty one.

\stopbodymatter

\stoptext
fails to prevent a blank page at the end. Is there a new way to do this now?

I used to rely on \installpagebreakhandler{last}{}, but this does not seem to work either: it now permits a final page with a page number.

Alan