Hi there. I got the trial version of ragdoll and couldnt find any option to lock certain rotation axis’s. I was wondering if I should buy the ragdoll unlimited version ($199) or the complete version ($79) to unlock this. Or is it there in the latest trial version itself? Thanks!
Hi @Rchive, welcome to the forums! 
Locking of axes is supported in all versions of Ragdoll, both Maya and Blender.
See here for a tutorial.