But if I just delete the existing fly I think all my waypoint missions will be deleted, which I definitely don't want to do. It's interesting that my current fly version is 1.19. But softonic only has these: I can't find my screenshot. Maybe later.
No need to roll back ,Simply Delete the existing Fly and then go to APK mirror and select the version you want to use.
Remember to clear your cache or the new install won't work!
Since batteries are consumables and the future is uncertain, I've picked up a some extras for a few of my drones. For longevity purposes do you think it would be better to just include them in the current rotation so that I end up with even usage...
DON'T DO THAT!!!!! Your batteries will condensate in a fridge!. Just a cool space away from direct sunlight is fine.
Keep them at storage (60%) till day of flight...use them...Re-charge to 60 and store.
You also dont want an airtight container...