Now they say the loss is more than a $100 millions!!
The other day they made a statement in which they said that they were cooperating with various investigators, but they did not find the reasons for the hack. And after that, they say that they carefully study everything to make sure that users are safe, and recommend updating the wallet software to the latest versions. It is rather strange to talk about security if the reason for the hack is not determined.
They also stated that they do not store users' private keys. This has been questioned before by various investigators.
In general, nothing becomes clearer from the statement of Atomic Wallet, they are just trying to put a good face on a bad game.