NB: The xcsoar-rasp.dat file is PHYSICALLY a zip file, so your browser may see it as xcsoar-rasp.zip when you attempt to download it (particularly if you use Internet Explorer, although it depends on your browser and system configuration).

If you use Internet Explorer:
Left click on the link below, select 'Save' then simply save it renaming it as xcsoar-rasp.dat when the save dialog comes up.

For Firefox users:
Right click on the link below and select 'Save Link As' and the file name should automatically come up as xcsoar-rasp.dat, then save it.

Download the file here: XCSoar RASP