diff --git a/RELEASE_NOTES.md b/RELEASE_NOTES.md
index f006a96..b8cddb0 100644
--- a/RELEASE_NOTES.md
+++ b/RELEASE_NOTES.md
@@ -13,7 +13,21 @@ The v1.2 self-updater silently failed on installs inside Dropbox-synced folders.
 - **Helper writes a step-by-step log** to `_update-helper.log` in the install folder. If a future update goes wrong this is the trace.
 - **Stale failure markers are cleared** at the start of every new update attempt, so a successful run leaves the install folder clean.
 
-## Install
+## Already on v1.0, v1.1, or v1.2 and inside a Dropbox folder? Read this first
+
+**The auto-updater in earlier versions won't reliably take you to v1.3** if you installed RemSound inside a Dropbox-synced (or other file-sync) folder. That's the bug v1.3 fixes — but the fix is in the *running* version's helper script, not in the downloaded zip, so your old version can't use it. The pre-v1.3 helper retries for only 5 seconds before silently giving up and relaunching the old binary; your About dialog will keep saying the old version even after pressing **Yes** on the update prompt.
+
+Manual install fixes it permanently:
+
+1. Quit RemSound (right-click the tray icon → Exit, or just close the window).
+2. Wait ~30 seconds for Dropbox to settle.
+3. Download `RemSound-v1.3.zip` below.
+4. Extract it on top of your existing install folder (right-click → Extract All, point at your RemSound folder, accept "replace files"). Or unzip somewhere else first and copy the files across.
+5. Launch RemSound.exe. About should now report v1.3.0.
+
+From v1.3 onward, **Check for updates** uses the hardened helper (60-second retry window, failure markers, no silent rollback), so you only have to do this manual step once.
+
+## Install (clean machine)
 
 1. Download `RemSound-v1.3.zip` from this release.
 2. Extract somewhere with write permission (e.g. `C:\RemSound\`, `Documents\RemSound\`, etc.). Avoid `Program Files` unless you grant write permission so the self-updater can replace files in place.