Just did a little more digging; not only is my Glo not showing up at all on the left panel in ADE, but I can't read any of my epub books that are on my Glo which I had transferred to it successfully via ADE yesterday (and which I had no trouble opening and reading yesterday). All my epub transfers are now giving me an error message on the Kobo screen saying "oops this document couldn't be opened .."it's protected by DRM and isn't currently authorized for use with my Adobe ID (because the Kobo Settings Account page says I'm not signed in with Adobe Authorization, and I can't sign in because ADE won't display the device when the USB attachment is there and Windows can recognize it with no trouble).
This Catch 22 is extremely frustrating; I don't know whether it's Kobo, or Adobe, or both, but I'm not getting any support from either of them on this, so far ... And I can't read the roughly 80 e-books I paid for and can still read in ADE and on my ancient Kobo Wifi if I can stand putting up with it. So what's with Kobo Glo and ADE?
My wife swears after watchng me struggle with this she'll NEVER buy an e-reader. This is not going to help either Kobo's or Adobe's reputation with her circle of friends, or mine, one whit.