In installed the 64 bit version today and then uninstalled the 32 bit version.
I'd been running the 32 bit version previously, with system tasks to start the content server two times. Once on port 8080 for myself and once on port 8081 for another family member, using a saved searches to narrow down the content differently for each instance.
With the 64 bit software, I can no longer connect to the content server that is started as a stand-alone. I can stop that task, run it within calibre 64-bit, and that does work. I did update the path for the new location of the software in my tasks.
Could there be a problem with the content server in the 64 bit version? I too see the task running like the original poster.