...MorphMan40, on that page, also works. It's kind of antiquated though. Sometimes useful for batch deletes. Renaming of external/internal names can be done in Poser itself via dial settings dialogue. I use Dimension3d's Binary Morph Editor for pmd perusal and manipulation.

I've never had Cr2Editor crash from anything, in the times I've used it. I just use a text editor for Poser file manipulations. I use EditPad lite. I've never come up against any difficulties using it, including manually hacking pmd injections and creating geometry switching dials.