IMPORTANT ANNOUNCEMENT
Please, do not use built-in functionality, to back-up your wallet!
Most likely it will generate incorrect data and backup will NOT be usable.
You can backup your wallet manually. Files reside in ncc directory:- windows: c:\users\\nem\ncc\
- mac/linux: ~/nem/ncc/
There are always two files: wallet file (.wlt) and address book file (.adb)
bump
bumping to raise awareness
I think this should be added to the OP (along with a statement saying it will be fixed soon) to make sure no one loses their NEM by mistake.