Week 4-BN: add explicit 'stop the debugger (press the X)' steps 15b and 25c

End each dynamic section by killing the debug session (X / Debugger -> Kill) before
the static pass, so the OpenOCD session is shut down and the probe is free.

WEEK04/WEEK04-BN.md

@@ -686,6 +686,12 @@ Press **Resume**. The loop branches back to `0x1000023a`, which reloads `movs r1
 
 Press **Pause** to stop the output flood.
 
+### Step 15b: Stop the debugger (press the X)
+
+The live hack is done. Before the static pass, **end the debug session**: in the **Debugger** sidebar, click the **X** (**Kill**) button. That disconnects Binary Ninja and shuts down the OpenOCD session, freeing the debug probe for the export and flash steps.
+
+> If the X is not visible, use the menu: **`Debugger -> Kill`**. Note the difference: **Detach** only disconnects the GUI and leaves the OpenOCD server running (still holding the probe); **Kill** ends the session outright.
+
 ---
 
 ## Part 4: Static — Resolve the Functions in Binary Ninja and Patch (Project 1)
@@ -1245,6 +1251,10 @@ Same idea as Project 1, different addresses. Here the format string is at `0x100
    ```
    then stops at `0x10000252`. One iteration only — the loop reloads `r0` each pass. The permanent version is the static patch in Step 28b.
 
+### Step 25c: Stop the debugger (press the X)
+
+Same as Step 15b: end the debug session before the static pass — click the **X** (**Kill**) in the **Debugger** sidebar (or **`Debugger -> Kill`**). This shuts down the OpenOCD session and frees the probe.
+
 ---
 
 ## Part 6: Static — Resolve the Functions and Patch (Project 2)