Euphony License is connected to your hardware. It only works on the same hardware – the one used when initiating the registration process. 

If necessary, you can transfer your Euphony License to new hardware for free. 

In Euphony major version 3 when you buy a Euphony License, you receive a voucher code. You can then use that voucher, together with your hardware fingerprint that is automatically passed to the online registration form, to obtain the registration code (regcode). This regcode is then used to register your hardware. 

In Euphony major version 4 you don't need registration code. Registration is checked against your fingerprint and voucher code.

If you decide to change hardware, we need to transfer your license to a new fingerprint – unique to your hardware. When you install Euphony on new hardware, boot it, and you have access to the Euphony Web Application, go to Settings -> System -> System info and note the field: Hardware fingerprint. Open a new Ticket with a request for hardware change and copy/paste (as text) the fingerprint into it. We will make the necessary changes in our registration database and either: send you the new regcode which you must enter in the registration dialog (for v3) or tell you to register again with your voucher (with v4).
Your previous registration (for old hardware) will be automatically rendered invalid in our database (your status on old hardware will become: unregistered and the old regcode won't work anymore if you try to register with it again).

IMPORTANT: 
In this registration context 'hardware' means: Motherboard, CPU and Ethernet network card(s). Other internal components like storage, WIFI card or RAM are not included and can be freely changed/replaced without losing registration status. 
Also note the following:

1. Ethernet network card is required to be present! Even if you successfully setup a WIFI connection, remove the Ethernet cable and only use WIFI to connect to Euphony - do not remove the Ethernet network card or disable it in BIOS!
2. Adding another network card or removing a card while leaving another present may also change your registration status! Please use your trial period to firmly settle on the desired configuration regarding network cards before buying a license or requesting a transfer.