Lost password can be replaced with a new one.
First, get in your account sign-in screen.
Select the item "Settings" in the bottom-right corner, then select "Sign In".
Select the item "Lost your password?" on the application sign-in screen and enter your user name or email specified at registration.
Then check your email: there will be a letter in the "Incoming" folder indicating further actions to change the password.
If the "Incoming" folder does not contain a letter about password recovery, then it is most likely in the "Junk" folder.
Check the "Junk" folder.