Q. Are there any registry settings I can customize?
A. Yes, under HKEY_CURRENT_USER\Software\GOFF Concepts\FileSearchEX.
Q. Is FileSearchEX a portable application?
A. Yes, in the sense that you can run the installer with the "Advanced Manual Install" option checked and it will extract the files. Then you can copy the executable to where you wish.
Q. Does FileSearchEX require administrator permissions?
A. No, but the installer does. This is a requirement of the Windows OS if you want a system wide right-click context menu to appear on folders.