DPP++ has been tested under Windows XP and Windows Seven, 32 and 64 bits, English and French versions (DPP++ is not supposed to work with other langages). If you are using other Windows systems, please try the trial version before purchasing the full version to be sure that DPP++ work under your system. In all cases it is strongly recommended to try the trial version before purchasing the full version to be sure that DPP++ works well under your configuration.