"This licence is registered to another device" — moving to a new device

A licence key activates one device. When it has already been used, entering it on a second one gives this message.

If you are replacing a device

You need a reissue, which releases the key from the old device so it can be used on the new one. Either:

• Log in to the client area and reissue the licence yourself, or
• Open a ticket with the Device ID shown on the new device's licence screen.

Then press Activate again on the new device.

If you want the app on two devices at once

That needs a second licence, not a reissue. A reissue moves the licence; it does not duplicate it.

Why it happened without you moving anything

Two ordinary things change a device's identity: a factory reset, and installing the app on what looks to you like the same device but is a rebuilt one. In both cases a reissue puts it right.