Only Poser 12/13 are now supported with the current version of Octane.

Poser 12 changed to a newer version of Python and the Poser plugin has been updated to support that.

I have used Octane since it was released as beta and am very happy with it.

Poser 13/Superfly has caught up with regards to speed, but lacks some features which I really like such as cloning, easier material layers, better HDRI support, micro displacement,  VDB support (cloud data), etc.