Message You have exceeded the number of uses

If you receive this error message, there are three possibilities:
1- You are on not a client yet and your trial version has expired. Contact us and we will extend your trial period.
2- You are a client and your licences are not paid yet. In that case, contact us and we will extend your number of uses until your licences are paid.
3- You are a client and you forgot to do the registration via Internet the second time. In that case, you just need to go to File -> Registration via Internet.

You will then get the message telling that the licence has been registered. Then, close PlanningPME and open it again. It should solve your problem.
To know more about licences management....
How to remove a licence on a computer and install it on another computer?