Hi EGIE,
Unfortunately, due to the way SketchUp’s WebDialogs work, if you click outside the Render Settings window (such as on the ‘start render’ toolbar button) immediately after typing something in one of the text fields, your typing will be undone. To make your entered value stick, you first need to press tab, or click somewhere else in the Render Settings window. That will cause the value to be saved and the scene to re-render (if you’re in auto-update mode).
Regards,
Shaderlight support