Cant Log in - Invalid Product Key

[svensk3n]

As titel says i can't log in with my lifetime key all it says is invalid product key, authentication failed

2015-09-11 06:32:25,468 [1] INFO MainWindow (null) - Demonbuddy v1.1.2613.426 started
2015-09-11 06:32:30,499 [4] INFO MainWindow (null) - Logging in...
2015-09-11 06:32:30,736 [4] INFO MainWindow (null) -
Invalid product key!
2015-09-11 06:32:30,841 [4] INFO MainWindow (null) - Authentication failed!

pls help me

 

[Tony]

use your key properly