Congratulations on your purchase of Merlin 8.
Merlin 8 works with AltaCom II, AltaCom 4x, AltaCom 4xR weatherstations, adding SMS texting to all other Merlin functions and features. You can install Merlin 8 on one computer, you have access to free updates for 3 years.
When you register the SMS function Altalab will send you a license file (this may take up to 24 hours, as it is done by hand). When you copy that file into your Merlin folder it unlocks the SMS capability.