Hello, Archon. You cannot go to the previous version of the game, however, you can try a number of things to improve your performance:

1) Disable Adobe Flash plugin;

2) Update your browser to the latest version;

3) Make sure Hardware Acceleration is enabled;

4) If nothing else helps, you can try to download the desktop app from the front page of the Portal.

Dimitri Molchanov said:

Hello, Archon. You cannot go to the previous version of the game, however, you can try a number of things to improve your performance:

1) Disable Adobe Flash plugin;

2) Update your browser to the latest version;

3) Make sure Hardware Acceleration is enabled;

4) If nothing else helps, you can try to download the desktop app from the front page of the Portal.

Gracias amigo, instale la app de escritorio y me funciona muy bien el juego, vuelvo a la guerra 

Thanks friend, i install the desktop app and de game works better, i come back to the war.