(4) The provider can, without being obliged to do so, update or further develop the software at any time and, in particular, adapt it due to a change in the legal situation, technical developments or to improve IT security. In doing so, the provider shall take the customer's legitimate interests into account and inform the customer in good time of any necessary updates. In the event of a significant impairment of the customer's legitimate interests, the customer shall have an extraordinary right of termination.