Yes, but this is because you are running a development version of WeatherCat. In the development versions, the builds have expiration dates. The most recent release of the regular version of WeatherCat is 2.2.3 and it does not expire. You are running 2.3.1, which is still in beta testing. The beta versions have some additional features but are subject to both expiration dates and have not yet had all the wrinkles ironed out.