Hi,
an easy way to repour polygons is to use the key combination t,g,a. You can access it also by the menu Tools/Polygone Pours/Repour.
Another useful keystroke is t, g, h to shelve all polygons.
If you want to perform an action on a selected polygon or a group of selected polygons, just right-click (after selection) and press y then you can shelve or repour selectively.