There seem to be a few bugs in the new version. I messaged the author about them, and he said he is aware and is working on a fix. Hopefully he will be done soon. (And the file locking caused by references in Poser isn't the only reason it is doing this. I have had it happen without poser even running, so don't kill yourself with correct reference. If you ran all your files and they came out correct, it is probably part of the bug.)