You can use the shortcut option mentioned above -screen-width 1600 -screen-height 900 and it will display normally. This will be fixed in the next version. Not sure why this happens but will be fixed in the next update. If you need help in creating the shortcut I can explain it further let me know.
Right Click SpriteCreator used to launch the program and select "Create Shortcut". Then right click that shortcut and select Properties. In the "Target" field you will see a path to the real file. At the end of all that path stuff copy and paste(without the quotes) "-screen-width 1600 -screen-height 900"
It should look like this:
C:\Users\jense\Desktop\SpriteCreator3\SpriteCreator.exe -screen-width 1600 -screen-height 900
Your C:\Some Path\More Path\SpriteCreator.exe will look different but once you add that line you just run from that shortcut once and after that you shouldn't need the short cut anymore. Everything should be normal.
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.