I have a P4P that i have not flown for a while due to illness. Purchased a MV over internet and wish to conform to latest firmware. My Dji GO4 app is up to date: however i have never used the Dji Assistance 2 and i noticed that there is a number of different downloads. Please instruct me about the latest version to download on my computer. Thanks to you guys i have injoyed the experience of flying the Quadcopter. I am 80 years young!