We are utilizing GoDiagram for .Net WinForms in a User Control hosted in Internet Explorer 11. It has been working fine for several years. Suddenly, within the last month I would say, the drag&drop functionality from the palette to the canvas has stopped to work, as well as the moving of elements within the canvas. It is possible to select an element with the mouse (it gets a green border), but it cannot be dragged.
I am using the reduced trust dlls.
I am running i Trusted Sites.
I have set the registry key EnableIEHosting=1.
Any ideas of what has happened from Microsofts/IE side or what to do about it?