These dialog boxes can be hidden behind other things or outside of the screen. Depending on the version of Poser there are different solutions. A reinstall will only work if you really wipe everything related to Poser from your box (including register entries and obscure directories). Different versions of Poser store these things in different locations. It sometimes helps to minimize Poser. Remember DLL files in the Windows directory are generally not overwritten when you do a reinstall.