Bernafon Nano RITE programing software

I have just acquired a left and right Bernafon Nano RITE hearing aid. Unfortunately it is pre programmed for somebody with far greater hearing loss than myself. This hearing aid was purchased in 2016, I am looking for the most appropriate Bernafon Oasis software so that I can self programing the devices. Also, what hardware will I need to purchase in order to communicate with the devices?
Can anybody help me?