Ok, I have found out that I am using the premium version.
If I enable the events calendar in the premium version, how do users
add or edit Events when browsing the forums? i.e. where is the option
to "Add/Edit Events"?
To enable the events, I have tried the following.. is there anything else I need to do?
I login to the admin interface. Under the main Admin menu, I choose
"Security settings", then "Set group permissions", then I choose the
user group which I want to enable the events calendar. As the
screenshot below: