You did not lose them. They are in address DJ1y4xKMCqtYSCvgGkobAfLxLWjme3G9o6. Is that your address on your personal wallet or an exchange address. If an exchange address then you need to complain to the exchange that they did not credit your coins. If you were just sending 1 coin a test then the address would be one of your change addresses.
Thanks for your support! I do not know what you mean :O I sent 1 DGB for test from one ledger address to another ledger adress! I do not know why 539 were sent at all!
Thanks, br
Because when you send coins the entire input must be spent 100% and the the difference is returned to you as change. If you used a Ledger then this is a change address created by your Ledger and the coins will be shown in your Ledger balance. It is now a new input to be used in the future. All crytpo coins works this way. If someone sent you 100 coins, those coins become an input of 100 coins. If you send 1 coin the entire 100 coins must be destroyed, the 1 coin is sent, a fee is taken, and the balance is returned to one of your change addresses. You did not lose anything. The 539.70574 DGB will still be reflected in the balance shown on your Ledger app.