In future, it will have BIP32 deterministic wallets. You only need to backup the once, immediately after starting the app for the first time.
That's a shame. I don't like reusing addresses (I.E. change back to the same address, or, multiple payments) for the sake of it being hard for me to manage what payments are what (One address/payment is a lot easier), so, this wallet is unusable for me at it's current state. Hopefully when you come out with this feature it'll be usable. Is there at ETA (Time/version)? Or, is it just in limbo currently?
The project is open source and free software. You could have coded the feature already 3 years ago. Heck, you could even have submitted a patch by now! Why didn't you do?
I... I... I don't know. Why didn't I? Hold up just one second, this is your project, stop making me feel guilty!
Probably because by the time I got a Java IDE up and running, got familiar with your code, researched how BIP32 works, implemented into the code that's not a complete hack, and, had everything running nicely, someone else would have beaten me to the punch... and I'm relatively lazy. I'm sorry :'(