Restore important app. data from iOS 10 after an upgrade to iOS 11

Solution 1:

That’s how I solved it:

Requirements

• iPhone / iPad with iOS 11 running the password app which is not supported anymore
• spare iPhone / iPad running iOS 10 with same password app freshly installed and no data inside

Procedure

• download the latest free trial version of the iPhone Explorer
• connect the iOS 11 device
• go to Apps
• select the password app
• click MOUNT APP to display the appdata folder in a virtual drive with limited read / write access (Note: the trial version of iPhone explorer offers only 150MB of data to be written)
• copy all files and folders to your local hard drive, make sure the folder structure is the same
• connect the iOS 10 device
• go to apps
• select the empty password app
• click MOUNT APP and copy over the iOS 11 appdata from your hard drive to the iOS 10 device
• disconnect the iOS 10 device
• open the password app and enter your master pin
• you should now see your passwords listed as usual

Hope that helps!