[capthr]

6.2.2 IS the latest but read below from Sprite website:

Backup Files Created Using Earlier Versions Can NOT Be Restored with 6.2

We have improved the Restore process in Sprite Backup 6.2. As such it is NOT possible to restore Backup files created with earlier versions of Sprite Backup using Sprite Backup 6.2. If you wish to restore a Backup File created using an earlier version of Sprite Backup simply remove Sprite Backup from your device, then locate and tap on the Backup file using File Explorer.

It is strongly recommended you update your backup library to only contain files created using Sprite Backup 6.2