The license key you entered does not entitle you to use this version of the software.

Are you getting the previous message?

In this case, you have downloaded a newer version of the software that your license doesn’t cover anymore. You will get the error message if you are trying to use a software version released over a year after the license purchase. You need to upgrade the license to use the new software version. Or you can always download an older version and keep using it with your current license.

Each purchased license will be valid for an unlimited time. So it works forever. You can use all new software versions that are released within one year after the purchase.