Lost access to REV X vst and others, UR824

Hello, I understand the UR824 has hardware fx such as rev x reverb and the compressor etc. As I understand it though, the hardware is mainly for latency free tracking and useless for sending to the final mix, or troublesome to reroute. Because of this, Steinberg (Yamaha) included the free vst versions so you can insert as much as you like in your tracks. Recently though, I have noticed that when starting up Cubase, I get a message saying ‘license expired’ and those plug ins are no longer available to use. I really like Rev X so what do I have to do to reortherise this software? Many thanks.