Should be the same with the new ADE, but it does have all sorts of bugs.
Unless you need one of the extra features of the new ADE, try reverting to the old ADE.
There are lots of bugs in ADE2.0 (and 2.0.1). Try replacing ADE2.0 with the older but more reliable v1.7.2.
(You can have them both installed at once if you like.)
Version 1.7.2, it is a little difficult to find, available on Adobe site for Windows and for Mac.
The forum software is sometimes corrupting the link above. There shouldn't be a blank in 'editio ns.html'. The following redirects to the same page: http://tinyurl.com/diged172
Some people have found ADE trying to upgrade automatically.
It appears (not 100% sure) that if you install ADE2.0 as a new install (not as an upgrade) that your 1.7.2 will continue to run.
Probably best to say no if 2.0.x installation asks if you want to migrate your library.
Thanks for your help. I've done that, but now the 1.72 version isn't showing any of the books purchased from Kobo. They appear in my Kobo desktop library and show as purchased. How do I add these manually so I can download to my ereader?
You will need to find where the .epub files are on your computer at the moment: probably in some Kobo folder?
You should then be able either to drag/drop them from Windows Explorer onto ADE,
or use ctrl-O while in Library pane and open them that way.
Thanks for your help. I've just discovered that the problem lies with
the Kobo desktop application- it would show 'content locked' when I
tried to open a book on the Kobo desktop. I contacted them, re-installed
and all is now OK. Sorry to have troubled you