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Your best place to start would be to download the Licence Master User Manual. It contains instructions on how to install and configure the module. It also tells you how to integrate your modules with LM to protect them against unlicensed use. The trial version has nearly full functionality, however, for it to start to protect your modules, you need to buy a licence. You can order a licence here. We will then send you a licence key. When you install the key in Licence Master, the module will be fully functional.
Let me know if you need any more information.