To uninstall the desktop application, navigate to C:\Program Files (x86) > FlSPlan.
Then double click the icon for Uninstall.

This will remove the application but will not delete your client data files.
Your files may all be stored on a single folder that is known to you, such as the Family Law Software folder under your Documents folder.
Otherwise, to find your data files, you can use Windows Explorer to search for all files that end with “.fls.” So you would navigate to Local Drive C: and enter into the search box *.fls.

You can use a similar technique if the files are stored on a network drive.