Need previous version PMS for ReadyNAS

Server Version#: plexmediaserver-annapurna_1.43.2.10687-563d026ea_armel
Player Version#: N/A

I just updated my ReadyNAS RN214, running firmware 6.10.9, and now Plex Media Server won’t start. How can I access the previous version of the PMS installer? Everything seemed to be working just fine until this update. I’ve tried searching the forums, the Plex website, and the web.

<If providing server logs please do NOT turn on verbose logging, only debug logging should be enabled>