Look for a file named PES2021_ML_Money_Tool_UPD_v2.3.zip (version numbers vary). The file size should be roughly 500KB to 2MB. If it is 5MB, it is likely a virus.
If you search for PES 2021 cheat tools, you will find dozens of links from 2020. These older versions are and ineffective for three reasons:
: Can also prevent player ability decline or edit training stats. 3. ML Budget Manager (Final V1.0)
How to edit Players Team Role in Master-League (workhorse etc.)