I know that AE CC 2014 could use watch folders so that you could create a render farm. However, I joined CC with AE CC 2015 which does not support watch folders with the render engine.
Does anyone know if the newly released AE 2017 supports render farms using the watch folder?
Alternatively, is there a download link somewhere for AE CC 2014? My Create Cloud app lists all of the 2015 apps I have as well as the 2017 apps, but doesn't offer the 2014 versions.
After Effects CC 2017 supports watch folder rendering.
To answer your other question, you can install CS6, CC, CC 2014, CC 2015, CC 2015.3, and CC 2017 all side-by-side via your Creative Cloud app, but the older versions are a bit hard to find. This page should help.
But, as Victoria points out, CC 2017 supports watch folder rendering, so I would just go with that.