By default FreeFileSync opens the operating system's standard file browser on each double-click by invoking "explorer /select, "%name"" on Windows and "xdg-open "%dir"" on Linux.
However the user is free to integrate other external applications into FreeFileSync: navigate to "Menu -> Advanced -> Global settings: External Applications" and add or replace a command string. The first entry is used when double-clicking a row while all other entries are only available via right-click context menu on main dialog. The following macros are available:
%name - full
file or directory name
%dir - directory part
only
%nameCo - Other side's counterpart to %name
%dirCo -
Other side's counterpart to %dir
Examples:
Start
visual difference tool:
"C:\Program
Files\WinMerge\WinMergeU.exe" "%name" "%nameCo"
Show
file in Windows Explorer:
explorer
/select, "%name"
Open
file in associated application:
cmd
/c start "" "%name" or
simply "%name"
Open
console dialog:
cmd /k cd /D
"%dir"
Note:
Don't forget to use
quotation marks if file names contain spaces!