Getting an "System.ArgumentException" error when trying to create a new connection (4335733)

Getting an "System.ArgumentException" error when trying to create a new connection.
Complete error message:
System.ArgumentException
An item with the same key has already been added.
Stack Trace:
at System.ThrowHelper.ThrowArgumentException(ExceptionResource
resource)
at System.Collections.Generic.Dictionary`2.Insert(TKey key, TValue
value, Boolean add)
at Quest.Toad.DB2.DB2ConnectionControl.RefreshUI(ConnectMediator
connectOptions)
at Quest.Toad.DB2.DB2ConnectionControl.InitUI(ConnectMediator
connectOptions, ConnectionFormStyle displayStyle)
at
Quest.Toad.ConnectionManager.ConnectionPropertiesControl.ProviderContainer..ctor(ConnectionFormStyle
displayStyle, BaseConnectionPropertiesPanel connectionPanel,
ConnectMediator originalOptions)
at
Quest.Toad.ConnectionManager.ConnectionPropertiesControl.CreateContainer(ConnectMediator
connectOptions)
at
Quest.Toad.ConnectionManager.ConnectionPropertiesControl.ShowContainer(ConnectMediator
connectMediator)
at
Quest.Toad.ConnectionManager.ConnectionPropertiesControl.AssignConnectOptions(ConnectMediator
connectOptions, ConnectionFormStyle style)
at
Quest.Toad.ConnectionManager.ConnectionPropertiesForm..ctor(ConnectMediator
connectOptions, ConnectionFormStyle displayStyle, Connection connection)
at
Quest.Toad.ConnectionManager.ConnectionPropertiesForm.ShowDialog(ConnectMediator
connectOptions, ConnectionFormStyle displayStyle)
at Quest.Toad.ConnectionManager.ConnectionPropertiesForm.ShowDialog()
at
Quest.Toad.ConnectionManager.ConnectionControl.createItem_ItemClick(Object
sender, ItemClickEventArgs e)
at DevExpress.XtraBars.BarItem.OnClick(BarItemLink link)
at DevExpress.XtraBars.BarBaseButtonItem.OnClick(BarItemLink link)
at DevExpress.XtraBars.BarItemLink.OnL

RESOLUTION