When minimized, you can't select SQL Plan Explorer from the task bar to see it

When SQL Plan Explorer is minized (see first screen shot), if I select one of the instances to view it (2nd screenshot), nothing happens. that is I'm returned to the state of the first screen shot.

Oops, I tried to submit the screen shots, but got an error!

Product ID: SQLSentryPlanViewer
Product Version: 11.0.116.0
Hardware Key: FREE
Exception Message:
An error has occurred:
Message: Object reference not set to an instance of an object.

System.NullReferenceException: Object reference not set to an instance of an object.
at Intercerve.SqlSentry.SqlPerfIntegration.UI.PostInformation.AddFileAttachment(String filePath)
at Intercerve.SqlSentry.SqlPerfIntegration.UI.PostInformation.btnAttachFile_ButtonClick(Object sender, ButtonPressedEventArgs e)
at DevExpress.XtraEditors.Repository.RepositoryItemButtonEdit.RaiseButtonClick(ButtonPressedEventArgs e)
at DevExpress.XtraEditors.ButtonEdit.OnMouseUp(MouseEventArgs e)
at System.Windows.Forms.Control.WmMouseUp(Message& m, MouseButtons button, Int32 clicks)
at System.Windows.Forms.Control.WndProc(Message& m)
at DevExpress.Utils.Controls.ControlBase.WndProc(Message& m)
at DevExpress.XtraEditors.TextEdit.WndProc(Message& msg)
at System.Windows.Forms.NativeWindow.Callback(IntPtr hWnd, Int32 msg, IntPtr wparam, IntPtr lparam)
Exception StackTrace:
at Intercerve.SqlSentry.SqlPerfIntegration.UI.PostInformation.AddFileAttachment(String filePath)
at Intercerve.SqlSentry.SqlPerfIntegration.UI.PostInformation.btnAttachFile_ButtonClick(Object sender, ButtonPressedEventArgs e)
at DevExpress.XtraEditors.Repository.RepositoryItemButtonEdit.RaiseButtonClick(ButtonPressedEventArgs e)
at DevExpress.XtraEditors.ButtonEdit.OnMouseUp(MouseEventArgs e)
at System.Windows.Forms.Control.WmMouseUp(Message& m, MouseButtons button, Int32 clicks)
at System.Windows.Forms.Control.WndProc(Message& m)
at DevExpress.Utils.Controls.ControlBase.WndProc(Message& m)
at DevExpress.XtraEditors.TextEdit.WndProc(Message& msg)
at System.Windows.Forms.NativeWindow.Callback(IntPtr hWnd, Int32 msg, IntPtr wparam, IntPtr lparam)

Additional Information:
MachineName: TDD00681689
OSVersion: Microsoft Windows NT 6.1.7601 Service Pack 1
CLRVersion: 4.0.30319.42000
IsUserAnAdmin: False
SystemDataVersion: 4.6.1099.0