Our license server maintains a list of client PCs associated with your license. When the license is first created, this list is empty.


When you start the simulator on a PC using your account, a hardware fingerprint is sent to the license server. This fingerprint is generated using information such as the computer's MAC address and other hardware details. Along with the calling IP address, this fingerprint is stored in the client list.


For example, if your license allows 25 seats, the list can grow up to 25 entries. If you attempt to start the program on a 26th PC, access will be denied, and you will see a message stating "Too many clients started."


If hardware components are changed in a PC, its fingerprint may also change, which could result in the system identifying it as a new PC. We understand that PCs may get replaced, break, or require maintenance. Additionally, we recognize that there is sometimes a need to move licenses to different machines. For this reason, we allow customers to reset their client list up to four times per year. This can be done by submitting a reset request to support or by logging into the License Manager.


Customers can also request to view their client list at any time by emailing support.


A client list reset clears all recorded entries, allowing you to start fresh and register up to the allowed number of PCs again. To ensure control over the allocated seats, we recommend starting the simulator on all client PCs immediately after a reset to lock the license to those specific machines.




Keeping Client PCs Static


To prevent duplicate entries in the client list and avoid unnecessary resets, we strongly recommend keeping client PCs as static as possible:


  • Always connect to the internet using the same method (e.g., via the same Wi-Fi or Ethernet connection).
  • Avoid frequent hardware modifications (such as changing network adapters, hard drives, or motherboards), as these may alter the PC's fingerprint.
  • If using laptops, avoid docking/undocking frequently or switching between wired and wireless networks, as this may impact how the fingerprint is generated.


Virtual Machines


The use of virtual machines (VMs) is not supported for licensing purposes. Due to the nature of virtualization, hardware fingerprints can change frequently, leading to potential licensing issues. Additionally, using virtual machines to circumvent licensing restrictions is considered abuse and may result in the license being blocked. If you require multiple installations, we recommend using physical PCs to ensure proper license management.


License Key Methods


We provide two different ways for your PCs to be identified:


Manual License Key Entry – You enter a license key on each computer. This key is stored on the machine and helps us identify the license it belongs to.


License Key File – We provide you with a license key file that should be placed in the installation folder on each machine. This method simplifies setting up a "master installation" that can be stored on a shared network folder or distributed via USB, network, or other media. Users do not need to manually enter a license key when this method is used.


By following these guidelines, you can maximize the efficiency of your educational license and minimize disruptions due to unnecessary client list resets.


License Manager


Customers can manage their licenses by logging into the License Manager. There, they can view a list of their licenses, including details such as license type, expiration date, and more.


By clicking the edit (pen) icon next to a license, customers can access the license string or, in the case of a file-based license, download the corresponding license file. The License Manager also provides options to request license resets and manage other license-related settings.