Answering my own question (why do you think of the obvious after posting?)
the only folder that I can see is Inbox.
Edit ~/horde/imp/config/servers.php and change folders from 'Mail/' to ''. I.E $servers['imap'] = array(...,'folders' => '',...);
Also it appears to no-longer have a "Hide Deleted | Purge Deleted" option on the menu.
This was fixed by cleaning out the old sql options data and starting fresh. HTH anybody else considering IMP. P. -- SLUG - Sydney Linux User's Group Mailing List - http://slug.org.au/ Subscription info and FAQs: http://slug.org.au/faq/mailinglists.html
