By 2021, Konami had stopped releasing official updates for PES 2015. This means:
Since you are using a 2021 editor, you can change the boot ID to match modern adidas or Nike models that didn’t exist in 2015. The editor supports boot IDs up to 500 , which correspond to community-created boot packs. pes 2015 bal editor 2021
✅ PES 2015 Editor by ejogc (v1.5 or v1.6 beta). It remains the most stable and feature-rich tool for editing BAL saves on PC. By 2021, Konami had stopped releasing official updates