fastfind - fast parallel file search (GUI + CLI)

fastfind-ui.exe without arguments opens the window.
In a terminal use fastfind-ui.com (or just 'fastfind-ui'), e.g.:
  fastfind-ui -ext pdf C:\Users
  fastfind-ui --help
Requires Windows 10/11 x64 with WebView2 (included in Windows 11).