PES 2017/2018/2019 Arsenal Start Screen by ABW

– Extract the archive with winrar and copy .cpk file to:
\Steam\Steamapps\Common\Pro Evolution Soccer 2017, 2918 or 2019\download\
– Open and select DLC in DpFileList Generator (by Baris or MjTs)
– Add .cpk as last checked, generate new DpFileList.

Credit ABW