In reply to Laurent.

Laurent, thanks for the comment. Yes, you can edit data interactively.

Add the data set to your project and open it in the data grid (not Data Explorer). Select Edit->Protect Data to uncheck the Protect setting, which will put the data set into an exclusive read/write mode. You can then edit the values. Your edits are applied immediately.

When done, close the data set or select Edit->Protect Data again.