first download this PSD file and open it by photoshop
http://www.mediafire.com/file/omehez4oytwykyn/pes+kit+convert+2017+to+2018.psd
now drag your pes 2017 kit to photoshop
select all by ctrl+A, copy it by ctrl+C, go to that file you downloaded before in photoshop area, paste by ctrl+V ... now...