Added more documentation

readme.md

@@ -20,4 +20,21 @@ just setup
 ```
 cd ~/BlueHam
 just done-goofed
-```
+```
+
+# Reruns
+If you want to rerun 73 Linux setup process, you can run 
+```
+just run-73Linux
+```
+followed by
+```
+just export-apps
+```
+to add the new apps to your menu.
+
+And if for some reason you need to fix your serial port permissions, you can run
+```
+just fix-permissions
+```
+## When this particular command asks for your password, it means your login password for the system.