We planned to update RhinoPiping for Rhino 6 before the fall, but it has been postponed for at least a few months because of some technical difficulties.
Unfortunately we are not able to give you any guaranty that we’ll be able to do it later.
However if you updated a RH5 license to RH6, you can still use RH5 with the same license, and they can both be installed on the same computer. We have several customer who use RhinoPiping like this, and while we are aware that this is not the ideal solution, it might still be worth it if you’ve got some piping projects.