When you download and run Realisor for the first time the software uses your account details to generate a computer code unique to the machine and registers that code with the licence server. The licence server defines usage rights and how long the machine is licensed for.
After being licensed once Realisor does not need to connect to the licence servers for as long as the licence is in place. This allows users to work in a disconnected environment. Once a licence expires Wovex Realisor will be disabled until it has contacted the licence server to access any updates. However, each time you are connected to the internet and start Realisor, it checks your licence days and will apply any changes automatically.