Extension Manager CC reached end-of-life before PPro 9.0 shipped, and should no longer be used, ever. https://www.adobeexchange.com/resources/27
Most users can rely on Adobe Add-Ons to manage extensions.
For disconnected users (or those using Enterprise licenses, not attached to a specific AdobeID login), ExManCmd is available:
Why would you choose such an installation location? Where did you make this choice?
We do not use Extension Manager CC to install our plugin. We click "install" on the extensions website and our plugin is getting installed by "Adobe Creative Cloud" client. We did not explicitliy choose "%Appdata%\Roaming\Adobe\Extension Manager CC\EM Store\Virtual Product" as install target somewhere. Creative Cloud copies our plugin to that place. On ZXP file upload to adobeexchange, we set for “Install Location” $userhomefolder/Documents because we do not know exactly what to do. There are three suggestions; everyone seems wrong. Is there maybe somewhere a tutorial that explans exactly what to do? Due adobeexchange accepts our ZXP, its construction seems to be valid, but somehow wrong.
Thanks for the additional info about disconnected users. We will need that later.
Thank you very much
That sounds bizarre.
How did you build that .zxp?
Please send me the .zxp, directly. [b b b at adobe dot com]