Why the rhino WIP is expired?

I have the license of the rhino and then download the WIP version. But several days later, it noticed me that the version will be expired. I don t know why. Could someone help me ?

WIP or Work In Progress builds expire after a few weeks and will continue to do so during the development process. This has to happen so we can get the new work we’ve done out to you for testing.

so i just need to download the new version and update it? thank you so much