There used to be an option under Zplugin/Transpose Master to store and load a Transpose Master project. It no longer exists in R6.
Anyone know what happened to it or why Pixologic got rid of it?
Many thanks!
When you use the plugin, all it does is create a combined mesh which is still in your project. So just save your project. 
Worked like a charm!
Thank you!!!
Yes, for version 4R6, the Transpose Master data is stored with the project. Note that it’s a good idea to create a new project for posing a model, as suggested at the bottom of this page:
http://docs.pixologic.com/user-guide/zbrush-plugins/transpose-master/