add more details to uninstall instructions

README.md

@@ -628,12 +628,14 @@ The command to update Powerlevel10k depends on how it was installed.
    ```
    If this command produces output, there are still references to "p10k" or "powerlevel10k". You
    need to remove them.
-4. Delete Powerlevel10k configuration file.
+4. Delete Powerlevel10k configuration file. This file is created by the
+   [configuration wizard](#configuration-wizard) and may contain manual edits by yourself.
    ```zsh
    rm -f ~/.p10k.zsh
    ```
-5. Delete Powerlevel10k source files. The command to do so depends on how you've installed
-   Powerlevel10k. Refer to the [installation instructions](#installation) if you need a reminder.
+5. Delete Powerlevel10k source files. These files have been downloaded when you've installed
+   Powerlevel10k. The command to delete them depends on which installation method you'd chosen.
+   Refer to the [installation instructions](#installation) if you need a reminder.
 
    | Installation            | Uninstall command                                                   |
    |-------------------------|---------------------------------------------------------------------|