There are a number of reasons that the Host a Meeting button may disappear from the GP4 application, but the most common is that GP4 didn't have a network connection when it was started and could not validate your account.
It is a quick fix, however, and can be accomplished by one of the two methods below.

Non-validated GP4 Interface (no Host a Meeting button).

Validated GP4 Interface with Host a Meeting button.

1. Select Validate Account from the Tools menu on GP4.
   
   
   
   
   
   
2. If you get the Your login information was validated dialog, your GP4 interface will change to the validated state and the Host a Meeting button will return.
   
   
   
   
   
   
3. If you get the Invalid username or password dialog, continue to Method Two below.
   
   

1. Select Preferences from the gp4 menu to open the Preferences dialog.
   
   
   
   
   
   
2. Click the Account Setup tab on the Preferences dialog.
   
   
   
   
   
   
3. Enter the email address used for the GatherPlace account in the Username field and your GatherPlace password in the Password field.
   
   
   
   
   
   
4. Click the Validate Account button on the Preferences dialog.
   
   
   
   
   
   
5. You should see the Your login information was validated dialog as shown below.
   
   
   
   
   
   
6. If you recieve the Invalid username or password dialog, re-check your email and password and try again.
   If you still have problems, see this article on how to re-set your password: KB 182093