Hi all,
I've solved it!!!

My ISP updated my router with a more strict firewall policy, so it was not related to my PC configuration.

Seems that some port used by LFS to configure itself was banned by my router firewall, thus the activation problems.

Thanks for the support.

Thanks for the replies!

I've read the Q&A, and I can reach the server:

PING:
Haciendo ping a master.liveforspeed.net [188.122.74.158] con 32 bytes de datos:
Respuesta desde 188.122.74.158: bytes=32 tiempo=30ms TTL=58
Respuesta desde 188.122.74.158: bytes=32 tiempo=30ms TTL=58
Respuesta desde 188.122.74.158: bytes=32 tiempo=30ms TTL=58
Respuesta desde 188.122.74.158: bytes=32 tiempo=30ms TTL=58

Estadísticas de ping para 188.122.74.158:
Paquetes: enviados = 4, recibidos = 4, perdidos = 0
(0% perdidos),
Tiempos aproximados de ida y vuelta en milisegundos:
Mínimo = 30ms, Máximo = 30ms, Media = 30ms

TRACEROUTE:
Traza a la dirección master.liveforspeed.net [188.122.74.158]
sobre un máximo de 30 saltos:

1 * * * Tiempo de espera agotado para esta solicitud.
2 4 ms 3 ms 4 ms 100.70.0.1
3 14 ms 3 ms 3 ms 10.14.0.53 [10.14.0.53]
4 3 ms 3 ms 3 ms 10.14.246.6 [10.14.246.6]
5 2 ms 2 ms 2 ms 10.14.2.14 [10.14.2.14]
6 3 ms 3 ms 3 ms i3d.baja.espanix.net [193.149.1.155]
7 27 ms 45 ms 27 ms frstd1-rt001i.i3d.net [109.200.218.252]
8 29 ms 29 ms 30 ms nlrtm1-rt002i.i3d.net [109.200.218.162]
9 33 ms 29 ms 42 ms nlrtm1-rt004i.i3d.net [109.200.218.247]
10 30 ms 30 ms 30 ms s11.lfs.net [188.122.74.158]

Traza completa.

There is no entry in hosts file, and no changes done to the system: I was not playing because of holidays.

I'm not running it from Program Files, but neither it was when it worked. I've tried to run it with admin rights, created a rule in Windows Firewall, disabled firewall completely, reinstalled the game, double checked and changed my game password...

Everything remains the same, I'm not able to unlock my license.

Is there any registry key that could be corrupted and is not cleaned with uninstall? Is the only thing that could make sense to me.

Thanks and kind regards.

Hi all,
I unlocked my S3 license, but after a month or so without playing, I've started the game and it seems is unregistered.

A bit weird, but when I fill in the details to unlock the license again, it can't connect with the server. I've tried rebooting the system, turning firewall off, everything remains the same, no luck. The only thing remaining is to reinstall the gamne.

Is the server down? Any link to check its status? What can I try? What happens if I use all my unlocks in the process?

Thanks.