I tried doing the LiteRig process again, starting with a clean Granny, with no bones and no poses but it still crashes when i go to export a model from the Install Pose.
If I make a simple test case of a vase with a couple bones and export that from an Action I don't get a crash so there must be something about this more complex situation that is the problem.
If I start a blank model, drag the Bones model into it, open the Install Action with that blank model... force the keys, save the PRJ... then export a mdl from the Action, that also does not crash. But of course, there's no Granny in that.
There is something about the Granny model that is a problem
If someone can make it all work, I would be curious to see that.