Their demand letter basically states that they use what I refer to as 'phone home' technology (or PDRSS) as they call it. PDRSS (Piracy Detection Reporting Security Software).

Private Server - client-side license acquisition is administered by the Private License Service of an Altium Infrastructure Server - a free, on-premise server that provides remote Altium product installation and license management.'.

Standalone - client-side license acquisition is managed by the user through use of a licensing file (*.alf).

On-Demand - client-side license acquisition is administered by an Altium managed server.

The system offers various licensing types to meet, and suit, your licensing needs : 'Altium Designer includes a streamlined licensing system, enabling you to get licensed and up-and-running with your Altium Designer Software in a timely and efficient manner. Their website notes several licensing types: They may be representing Altium software directly, or on behalf of the Business Software Alliance (less likely). You may have received a letter from the Worcester, Massachusetts law firm of McInnes and McLane. The letter may come from the Software Compliance Group, or worse, from McInnes, an intellectual property law firm. You may have received a demand letter (possibly with a sample federal court lawsuit) that threatens to sue the company and/or its officers and directors in a copyright infringement suit. 'Altium is the world's leading provider of PCB design software, PCB component and data management software and the host of AltiumLive - the industry's fastest-growing conference for PCB designers and engineers.' We are seeing a new name pop up on our software litigation list - Altium Software. Receive an Altium software infringement letter McInnes & McLane Introduction

Altium designer license cost