Sider 6.3.9 by Juce For PES 2020 PC Features:
– bug-fix: “set_stadium” event now works for Turkish League, Cup and SuperCup. (Which makes StadiumServer also work for these tournaments in League and Master League modes).
How to update from 6.3.8:
Aside from update documentation, only sider.dll is new – so take that and keep the rest of your files.