When a new update has come out and I have to download it again, I just download the newest build while leaving the older build on the device, check to see if my progress has transferred over, then delete the old build. Ex: Download v26 while v25 is still on the device. Open v26 and check saves, unlocks, CGs, and Barkest Corners. Once you see they are all there, delete v25. Hope this helps!