So I have done some researching on switching computers from one account to another and found that you must delete the computer from the account, restart LogMeIn on the host and then sign in to the account to change the account; furthermore, I think that LogMeIn should done something to make this process much easier. However, when signing into the account the option to change user profile is grayed out and when logging into LogMeIn Central it shows it has been place the computer in the old account instead of the new account.
as per the first URL given above mean exactly if you are on a Macintosh? When I fire up the Join.Me executable, I seem to be automatically logged in for a personal account I set up or at least started to set up but I'm trying to use another account for which I have credential and the "Login..." (and "Sign up...") menu items are disabled (greyed out). There doesn't seem to be any preferences menu item or System Presences entry for Join.Me... Poking around, there doesn't seem to be anythin appropriate available...
(second URL given above seem to go to a page that is no longer there)