Click the "My Cubes" cube.
Click the button "Remove cubes".
The cubes on the home screen now have a red trash can in the upper right corner. Click the trash can for any cube you want to hide.
Cubigo will ask for confirmation to remove this cube. Click "Remove".
You can re-add these cubes to your home screen at any time.
You do not want to remove cubes after all or you are you finished? Click the button "back".