Demo license error

[Tanmoy]

I have recently set up ATK 2016 on my computer and used demo license. Meanwhile i also installed license for free academic version. Now after 15 day trial period, I have reinstalled windows on my pc. After installing ATK while i am going to use demo license, it is showing ''demo limit for your ip address has been exceeded''. I have changed ip address but did not work. Is there a limit of how many times can i use demo version on my pc?
What is the solution?

[Anders Blom]

Is there a limit of how many times can i use demo version on my pc?

Yes there is. If you exceed it you can apply for an extended trial at https://quantumwise.com/free-trial/trial-license-form. If you want to publish any results obtained with ATK, you need to purchase a license.

[Tanmoy]

Thanks and my problem has been solved.