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Installer should create installation directories for IDE and AppServer only after the Install button pressed. If I am not mistaken we really have FramePreInstall so we can put this functionality into it. For the present moment these directories are creating/ deleting during walking through the installer panels (IDE and AppServer locations) and it is not a good thing really.. Simple problems should have simple solution.
installation directories for IDE and AppServer are created after the Install button pressed.