Check the created accounts in the account_Overview page. If not added to you navigation, just add it and give the admin access.Probably a lot of bogus demo users will be there, since you turned it on/off/on and added/removed the demo users. Maybe this might cause issues, to many named accounts for the use demo license key.
Next to that; your security is incomplete. Not sure if that is due to assigned module to userrole or the lack of it.