The first item at the top of the left hand server navigation window is "Enterprise". This gives you a view of all the servers in your enterprise.
The first tab shows you high level information about all servers being monitored by miniDBA:
The second tab shows all sql alerts across your enterprise.
The following screenshot shows that within the "Alerts" tab the current alerts are displayed by default:
Each line of the data grid displays a currently active alert and which server it is active on.