To disable the splash screen on PowerChute Personal Edition prior to version 1.4.x you must do the following.
1) Go into the PowerChute Personal Edition Folder. It would be under Program files/APC/PowerChute Personal Edition.
2) Inside that folder there is a file called Disablesplash.REG.
3) Double click on that file and hit YES or OK to the Pop up window asking about adding the information to the registry.
Rebooting the machine should get rid of that splash screen.
*Please note that this is for versions of PowerChute Personal Edition prior to 1.4.x. If you are using 1.4.x or higher then there is no option to disable the splash screen.