Hi there,
Sorry for the confusion. Assuming that you've entered the base game key, then the issue is that you're in the trial mode for one of the expansions. We don't expect folks to buy our expansions sight-unseen any more than we do the base game, so as a handy feature you can try out the trials of any expansion you like -- while you do, however, it puts the entire game into trial mode. You can easily turn off the unbought expansions by clicking Licenses / Expansions and simply disabling whatever expansions show up there. Or if your base game key hasn't been entered, you can enter it there.
Normally you'd need to specifically install an expansion for this to happen, so it would be more obvious why its in trial mode from the start. But our newest expansion, Light of the Spire, is currently in public beta and thus gets distributed whenever you update to the latest beta version of the base game, too.
Hope that helps, and thanks for your support!