Creative Cloud still supports Premiere v13.x but no longer supports the corresponding version of Media Encoder. I have several legacy projects still going in that version of Premiere but using Media Encoder to make proxies/exports no longer works because that version is not on my system. Please make version 13 of Premiere's system program available in Other Versions.
We appreciate you writing in. I believe there is some confusion here. Creative Cloud provides only the latest version and one version before that for download.
PR v 13.x is not available for download anymore. It is working because you have it pre installed on your computer. If you'll uninstall it now, it won't be available for download anymore.
I hope it helps.
It's not ideal, but you could create your proxy movies in a newer Adobe Media Encoder and then attach them afterward in Premere Pro (right-click the full resolution file and choose Proxy > Attached Proxies...). If all of the proxy filename match the corresponding full resolution filenames with "_proxy" at the tail of the file, the attach process should go quickly.