Hi Jens, and thank you for contacting us. You don't need any type of license key in order to run mSecure on your PC. You can download the Windows version from the Microsoft Store using this link:

 
• Windows 10: https://www.microsoft.com/en-us/store/p/msecure-5/9nblggh62pc8

After download the app, simply sign in to your mSecure account, and you should be all set.