DxO PhotoLab puts things into several Mac folders
/Library/Application Support/
/var/…/…/ (long way to Tipperary: better leave this alone)
/Users/xyz/Library/Application Support/Adobe/Lightroom/Modules/
/Users/xyz/Library/Application Support/
/Users/xyz/Library/Caches/
/Users/xyz/Library/LaunchAgents/
/Users/xyz/Library/Preferences/
/Users/xyz/Library/
etc.
Be careful when you trash things from within the /Library/ folder. It contains system relevant items.