I have just installed Adobe Exchange panel, but can not install any extension. I get this error on Photoshop: “Installation failed with error code: 1. The zxp installer has been copied to your documents folder”. If I try to install from that folder on My Documents, Adobe Extension manager reports "The extension is not valid. Extension won't install” (I'm translating from Spanish).
I have tried "free" and "Creative Cloud suscribers" extensions with no luck, from the Adobe Exchange panel and just by launching the extension packs: nothing works.
My Extension manager version: 6.0.5.9 (Adobe Extension Manager CS6)
OS: Windows 7, 64 bits (service pack 1)