Apply Vert | Scale Radial - use MMB option
Before I go any further, go to the Edit menu, and choose “Preferences”. In the “Advanced” tab, make sure “Advanced Menus” is checked, or you will not get the command options referenced in puzzledpaul’s tutorials. 
Now, once you have advanced menus turned on…
In any menu in Wings, ALWAYS eye the command info at the bottom left of the screen. What button you clik to select the command from the menu changes how that command works. The differences are reflected in the info bar at the bottom left.
In this case, while in vertex mode, R-click to get the comman menu, scroll down to the “Scale Radial” command, and select the command with the Middle Mouse Button. But before you do, as you have “Scale Radial” highlighted in the menu, look down at the info bar at the lower left and you will see it tells you that clicking “M” will allow you to “Pick axis and point to scale from”.
hope that helps!