How to upload Premiere Pro or After Effects file to Creative Cloud?

Since Adobe terminated the feature of the embedded Creative Cloud Folder in the Windows Explorer, I'm unsure where / how to sync my .prproj and .aep files to the Creative Cloud. Neither the desktop app, nor the Web Cloud Service lets me upload these file types, as they are not supported. Also, in Premiere Pro's preference settings, there's the option "Save backup project to Creative Cloud", but in my case it's greyed out (I assume it's now only available for business accounts?).

Has anyone faced the same issue?

Thanks in advance.