I downloaded and tried your latest version, and yet I am able to sucessfully convert a .PDF to a .TIFF. Unfortunately the conver quality is not very good at all. Text and images in the .PDF are not positioned correctly, and the quality of the images is quite poor. Currently your only option is to convert to an 8 bit, 100 dpi image.
Do you plan to enhance this capability to allow user selection of DPI and color depth?