On my old I1, I run version 1.1.2 and will NEVER upgrade to degrade it. Works great and goes like a bandit. Would like a I2 some day and sell my old I1 as is.
Oh, I did read if you do a backup, to do it to your computer and not the cloud as the cloud will only makes a link to the new version whatever it may be in the app store. At least that is the way I understood it.
I have a Inspire 1Kit with second remote, also includes 1 extra TB48 battery, Ipad Air 2 16Gig, Prop balancing rods and Hoodivision shade. Removed by seller