A modern icon theme for Xfe file manager, a combination of DamasDamas Icon Theme (which in turn in based on the modern Windows theme): https://github.com/sonakinci41/DamaDamas-icon-theme and the default Windows icon theme by Roland Baudin (default icon theme in Xfe file manager).
Clone the repository or download the latest version from the Releases page
If downloaded from the releases page, unpack the zip file
Open a terminal
cd Downloads && sudo mv xfe-modern-win /usr/share/xfe/icons
Go to Edit --> Preferences --> Themes
Under 'Icon theme path' replace
/usr/share/xfe/icons/windows-theme (or whatever theme was set)