Hi. I would greatly appreciate some help and advice with getting started with Litchi. I'm not sure what firmware I need to download if any. Currently I'm using very old firmware (think 1.4) and don't want to update to the newest firmware if it doesn't work with Litchi or I don't have to to use it. I have a P3 Advanced and us an iPhone 6 and mini iPad 2. iPhone will just be for FPV Goggle mode. Thanks in advance for help.