So I put the public release beta on my Macbook last night. Not my primary machine, so I wasn't too worried about the install...and also not paying very close attention during the process. Doing multiple things at once, I absentmindedly selected the option to upgrade to iCloud Drive, thinking that this would only impact that laptop. Now, of course, though I do have access to my iCloud files on that Yosemite laptop in Pages, etc., I have NO access to my iCloud files on any of my daily use devices -- iMac, iPhone, and iPad. Should have read more carefully, etc. Is there any way to revert to the current release version of iCloud, and restore file access for all of these pre-Yosemite/iOS7 devices? Any help would be greatly appreciated!