I have used the FTDI Basic to program both 3.3V and 5V Prominis.
As long as you don't have any other circuitry hooked up (i.e. take out the battery) you should be able to program with it. At the worst, you make up a little cable to swap pins around if needed:
This one just extends the wires, move the wires on end to suit your needs (made with crimp connector housing & terminated wires from pololu.com)
There are 3 little pads on the back for passing VCC straight thru from the PC, or using 3.3 that is generated by the FTDI chip.
So you can order the 5V version and check to see if the little trace is cut and the 2 pads soldered to each other, or order the 3.3V version and the trace should be intact with no extra soldering added.