IMAP Inbox Folder cannot be deleted

I added an IMAP gmail account to Opera 9.24 for my wife. I had a hard
time getting it to work, so I deleted the account. When the browser
was opened again, the mail account was gone, but there was an INBOX
folder under her filters. When you right-clicked, you could not delete
it or access the properties. It also doesn't appear in the Mail -->
Filters form. When you try to go to Mail --> IMAP Folders, it says you
need to create an IMAP account to manage folders. I decide to recreate
the account to see if I can get rid of it that way. I went to the
manage IMAP folders form, unchecked the INBOX subscription, closed it,
then deleted the IMAP mail acct. Now, when i restarted the browser, I
had 2 INBOX folders under the Filters section.