Parallels tells me my software is up-to-date. I'm running Sierra 10.12.6 which is Beta right now. I was able to do a windows 10 restore, which uninstalled parallels tools, and all my other applications, update to 16215, and then reinstall parallels tools, as well as my other applications. This worked on my x86, and 64bit VMs. It's a pain, and I'd appreciate an update, but I thought I'd pass a workaround along.