file compare tool suggestions / compare directories

Are there any suggestions for packages on Windows 64bit to use for file compare with Saladin?
I would generally be comparing:
text files, from php to css... wanting to know if there is a difference, and if so, to show where in the file the difference is.
potentially image files?
MSWord files
Excel files...

There is no file compare tool configured.
Select the tool in Saladin settings and try again.

Compare Directories doesn't appear to be function with version 0.4? Maybe I'm not using the function correctly?