Before make changes, add a widget on home screen, read this article if you have no idea to do so
After added a widget on home screen, you can change skin color or change hotspot application by following steps below.
1. Add "UCCW Hotspots Toggle" on home screen, and touch it to unlock the toggle
2. Hotspot mode has been turned off, then press on uccw widget to enter the edit page below. You may see more than one object you are allowed to make modification. Choose the object you want to make changes.