Houdini 16 will be supported in the next plugin build, but probably the Houdini 16 compatible demo will be released a bit later because we don't have the Octane 3.06 demo available yet, and the next plugin build has been updated with all the new 3.06 features.
I have found several problems while compiling the plugin for Linux and OSX that I must fix before release the next build, so the new 3.06 build including the H16 version is not going to be released until next week.
Apologies for the delay and thanks for your patience. -Juanjo