Widgets in Blue Aero theme, in the right side bar can be resized. In some cases you can experience problems with it, because your cursor just jumped too quickly or in some special cases, the widgets get shrunk without knowledge of the user, after the application frozen. In the image below you can see the shrunk widgets one over each other, so it is messed and you can not use it. The solution is bit tricky, but very easy.
First, navigate the cursor over the widgets, you should see interchanged top border with lower border:
Drag and drop the border. Depending on which one you were able to click on, drag it to top or to the bottom, to resize it. E.g. if you clicked on the lower border, you have to drag it from top to bottom.