Konami released PES 2013 DLC (Data Pack) 5.00. You can download PES 2013 Data Pack 5.00 via the 'Information > Data Pack Update' submenu in PES 2013.
PES 2013 Data Pack 5.00's biggest feature is the addition of all 40 participants of Copa Libertadores 2013 with up-to-date squads and kits. The UEFA Champions League 2013 Final Ball is also included.
PES 2013 game patch 1.04 fixes various game errors, mainly in Online. Download PES 2013 Patch 1.04 [Konami server].
If you are using PESEdit.com 2013 Patch you should download PESEdit.com 2013 Patch 3.6 (or higher) as it includes PES 2013 DLC 5.00 + PES 2013 Patch 1.04. If you download the Data Pack without updating your PESEDIT Patch, the game or patch contents might stop working.
Konami's official facebook post:
The Data Pack 5.0 will be released on the 25th of April, 2013, for PES 2013 on PC, PS3 and Xbox 360. It will update the Copa Libertadores mode and will bring many new items for the teams and players.
To make the football experience even more realistic, the players of each team will be updated to recreate Libertadores 2013: new kits, emblems, player additions as well as a new player list will come together with DLC 5.0. Moreover, the referee uniform, ball and emblem of the 38 main teams will be updated to the cup.
If it wasn’t enough, the new DLC will also feature Libertadores 2013 season added into PES 2013 as a new mode.