New update has been released this bug has been fixed.
There is no scrollbar on the right side of the screen. The scroll bar is the 2 bars below the clear icon. You should be able to use the scroll wheel any where on that, over all the icons and as far as to the edge of the right side of the screen. Also the shortcut link requires a space between the .exe and the start of the command. Though that will be ignored once the program loads.
Ok sorry I figured it out. I don't have any access to a scrolling device (I use a drawing tablet, and I don't have a mouse, touchpad or scroll wheel) and page up/down, touch screen controls, and arrow keys (what I normally use to scroll) do not work. I had to literally put the program on a usb and use my friend's computer to use the program lol.
Updated Sprite Creator. Uninstall the version you have and Install the new version. Page Up or Up Arrow and Page Down or Down Arrow will scroll through the category just like the mouse wheel currently does. Also Left Arrow and Right Arrow will scroll through the different categories. Hope this helps navigating Sprite Creator and selecting objects. Thank you for the suggestion.