Nooo! I've installed the rig and have a good bit of cp assignment done and now I discover the thumbs are rotating the wrong way. Help! Is it possible to alter them now? Just rotating the thumb bones in the PWS doesn't seem to do it. Thanks.

You can unhide all of the bones in the model by holding down the shift key and unhiding the topmost bone in the hierarchy, then select each bone in the thumbs one at a time and set the rotation or you could uhide them the same way, delete all of the thumb bones, drag in the thumb bones from the installation model (not the Posable version), position them and run the InstallRig plugin or you could use the saved Action from when you initially installed the rig using the Posable installation, make the thumb adjustments and then run the InstallRig plugin and re-finish the installation from there.

Hope that helps, Ken.


--------------------
EDIT
--------------------

Or, you could use the same Action you saved from the initial install of the Posable installation, re-position the thumbs, export it as if you were doing a typical installation (but don't run the InstallRig plugin yet), unhide all of the bones in the installation with the messed up thumbs, delete all of the thumb bones, drag in the thumb bones from the corrected installation and then run the InstallRig plugin. Make sense?

I just looked around for all the thumb bones/IK controllers. It took a while, but it's sorted now. Thanks again David.