The Tentacle device is the key to activate your software:
Go to our website https://www.tentaclesync.com/#download. At Application Software chose your version (Mac or Windows), download and open it. When you open the file menu License the window Software Activation will then pop up.
Now connect your Tentacle with the computer via USB cable, switch it on and chose Get a Free Device License (click on the icon). After giving the required information, you promptly receive an E-Mail with your license key, which you then copy and paste into the Software Activation window. Then press the Activate button. Your activation key now works independently from your Tentacle AND your computer - so you can activate the software (with your activation key) from anywhere in the world. Just make sure you deactivate it before changing computers, because it can only be activated at one computer at a time. That also means you can pass on your license key to your friends and colleagues (just ensure whoever uses it properly deactivates it when finishing). If you deleted the mail with your license key, go to license.tentaclesnc.com and it will be automatically resent to you.