How to take backup of custom created app from App engineen studio

[RudhraKAM]

Hello 

I am new to App engines studio , Created a new app using app engine studio , by creating updateset but as I created a Application , it created new application with that name and all the updates are in default updateset , But without Updateset is there a way we can backup that App ( i tried to publish it but Still it is not published in to repository .

What are the options I have .

[Harsh Vardhan]

@RudhraKAM  try to save on github. 

Adding one blog here. 

SAVE YOUR APPS TO GITHUB VIA AES 

Thanks,

Harsh

[RudhraKAM]

After saving that Can we move from one instance to other ?