Update README.md

README.md

@@ -5,7 +5,7 @@ removing all the other world files.
 This is a Python3 program and a Python3 installation is needed if you wish to use the .py file. 
 An executable file is provided so a Python3 installation is not needed.
 
-# Command line options
+## Command line options
 ```
 usage: clean_enshrouded.exe [-h] [-b] [-p] [-c] [-w WAIT] [-d DIRECTORY]
 
@@ -21,7 +21,7 @@ options:
                         directory to process
 ```
 
-# Recommendations
+## Recommendations
 
 By default (i.e. no switches on the command line), the program just analyzes the current directory and exits. 
 A `-c` on the command line is needed to actually process the directory.
@@ -32,9 +32,11 @@ the `Start in:` can be edited to the location of the world save files.
 
 It is recommended to make a backup first. The program will first create a `backup.zip` file in the current directory 
 if `-b` or `-p` command line switches are present. The `-b` switch uses the program 7-zip, https://www.7-zip.org/ and 
-the `-p` switch uses PowerShell.
+the `-p` switch uses PowerShell. The `backup.zip` only contains the world files.
 
 The program output is sent to a console window. If started from an Explorer window (or a shortcut), 
 this console window will close when the program exits. 
 A "sleep" for 10 seconds before exiting allows some time for the output to be read and 
 this time can be changed with the `-w` switch.
+
+The `-d` switch is optional and if present, the program will switch to that directory before processing begins.