If you are exporting a video with 2pass enabled in Premiere and Media Encoder at the same time the export will crash when the second pass is starting. I think this appears because of the mb-tree and passlogfile in the temp folder. Both programs are using the same file when exporting.
I think a solution could be that Voukoder checks if the two files already exists and creates the two files with another name like "voukoder-passlogfile-1" and "voukoder-passlogfile-1.mbtree".