Data Conversion Tool

I am using an air flow metere with usb connector. The software of the manufactorer does store the values in 1 sec steps, however it uses its own file format which does not support export of the data in different formats. I need a tool to convert the data in the file to a csv file, so I can do additional calculations in Excel. You will be provided the original software (Windows) and a sample file with real data. The converter must be executable in Windows 7 and Windows XP There is no need to provide the source code.