Hi at Nitro, Got a strange effect trying to activate Nitropdf Pro vs11, just like others who have reported this issue: The License portal says: 2 activations, 0 activated; License is active. Both my PC's say: --23 error; max. already used. So I think you have to make a change in my config file, I assume. If you like I do have a schreenshot available. Thanks in advance, RUUD