I bought the below FTDI programmer for use with my 3v3 arduino pro mini. But even when the switch is set to 3v3 it is powering the board with 5v, (hence the IO voltage is also 5v). Note that when the pro mini is powered by batteries on the RAW input the IO voltage is 3v3 as expected. The problem is that when programming at 5v, any 3v3 peripherals (such as the BMP180) will be surely damaged.
Now on the eBay description it says:
This board ship default to 5V, but you can cut the default trace and add a solder jumper if you need to switch to 3.3V
Which trace needs to be cut, and where does the jumper need to connect to/from?