the licenses.islicx file should be located in the silverlight application root. For example, if you create a ClientUI project named ClientUIApp1. By default there will be 2 project, ClientUIApp1 and ClientUIApp1.Web. The license.islicx file should be located in the ClientUIApp1.

If you will not compile the ClientUIApp1 project anymore in the final location, the runtime generation could be done on the development computer. If the final compilation will be done on the final location the license generation should be done on the final location.   

Based on my discussion with the developer, seperate cell /row edit mode and display mode feature has not been supported in GridPresenter. The feature is being considered for GridPresenter, however I do not have a fixed timetable for the release of the feature.

Based on my test, using query string select parameter I could successfully filtered the data in the Grid. Attached is the page I used to test the scenario.

The GenericObject class is already available on the WebGrid provided sample under the folder App_Code/GenericObject. Plese add a new function GetCustomersFiltered, here is the snippet:

// using Generic Collection
[System.ComponentModel.DataObjectMethodAttribute(System.ComponentModel.DataObjectMethodType.Select, true)]
public List<Customer> GetCustomersFiltered(string ContactTitle)
{
    List<Customer> customers = new List<Customer>();

    try
    {
        this.Connection.Open();

        string cmdText = "SELECT " +
            "CustomerID, CompanyName, ContactName, ContactTitle, Address, City, Region, " +
            "PostalCode, Country, Phone, Fax FROM Customers";

        if (!string.IsNullOrEmpty(ContactTitle))
            cmdText += " WHERE ContactTitle = '" + ContactTitle + "'";

        OleDbCommand command = new OleDbCommand(cmdText, this.Connection);

        OleDbDataReader reader = command.ExecuteReader();

        while (reader.Read())
        {
            Customer customer = new Customer();
            customer.CustomerID = reader.GetString(0);
            customer.CompanyName = reader.GetString(1);
            customer.ContactName = reader.GetString(2);
            customer.ContactTitle = reader.GetString(3);
            customer.Address = reader.GetString(4);
            customer.City = reader.GetString(5);
            customer.Region = reader.IsDBNull(6) ? "" : reader.GetString(6);
            customer.PostalCode = reader.IsDBNull(7) ? "" : reader.GetString(7);
            customer.Country = reader.IsDBNull(8) ? "" : reader.GetString(8);
            customer.Phone = reader.IsDBNull(9) ? "" : reader.GetString(9);
            customer.Fax = reader.IsDBNull(10) ? "" : reader.GetString(10);

            customers.Add(customer);
        }

        return customers;
    }
    finally
    {
        this.Connection.Close();
    }
}

Without query string the page will list all customer, if we wish to show all the Owner, the query string will be ?ContactTitle=Owner

After further testing using the sample code in this thread. You could disable the ColumnFreeezing during page load event. Here is the snippet, only disable the ColumnFreezing if the SelectedValue is C:

protected void Page_Load(object sender, EventArgs e)
{
    if(!Page.IsPostBack)
    {
        ddlChoiceA.Items.Add(new System.Web.UI.WebControls.ListItem("A: all columns", "A"));
		ddlChoiceA.Items.Add(new System.Web.UI.WebControls.ListItem("B: some hidden columns (16-19, 21-22)", "B"));
        ddlChoiceA.Items.Add(new System.Web.UI.WebControls.ListItem("C: no data", "C"));
	}

    if (ddlChoiceA.SelectedValue == "C")
        grdResult.LayoutSettings.AllowColumnFreezing = ColumnFreezing.No;
}

Based on my discussion with the developer, the FreezePane must be enabled or disabled in client side event handler. I am still in the process of simulating the scenario in my environment. I will inform you of any discovery I made.