Im pretty sure your backups will still work on the latest twrp recovery.
To upgrade your recovery download goomanager from the play store. Open the app and hit menu. Choose install openrecoveryscript and it pretty much does it for you. It's really easy.
Sent from my HTC Evo LTE
Current Phone: Samsung Galaxy Note 2 (Titanium)
Rom: Stock LK8
Memory: 16GB internal + 64GB Sandisk MicroSDXC
Case: UAG Scout, Trident Aegis (Black) & Official Samsung Case (Black)
Screen protector: Clear Screen Protector Shield Armor