Glad you are up and (mostly) running now.
Indeed by taking this approach with this plugin and using the "still work in progress" new PDF engine there was always going to be a risk of hitting some issues. Other than hitting the odd pdf that caused an immense amount of debug messages I hadn't had any crashes like you got but then I haven't exactly thrashed it.
Still, I'm sure Kovid will be "delighted" to find and fix them
