diff --git a/CHANGELOG.md b/CHANGELOG.md
index d44a0b1..e5143a0 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -9,6 +9,26 @@ every change carries a descriptive commit message.
 
 ## [Unreleased]
 
+## [3.40.0] — 2026-10-26
+
+### Added
+
+- **File-tree filter** (the file manager gains a **Filter** dropdown, next to
+  Sort).  A collapsed checkbox multiselect with: **All** (default), **Custom
+  files**, **Identifiers** (ICCID/IMSI/MSISDN/IMPI/IMPU/SUPI_NAI/GID1/GID2),
+  **PLMN selection** / **Provider names** / **WLAN/I-WLAN** / **SMS-related** /
+  **CB-related** (cell broadcast), and one option per file-backed service of
+  the cross-reference.  When a filter is active, directories that are not on
+  the path of the selected files are hidden; the button turns blue to stand
+  out.
+- **Expand all / Collapse all** buttons beside the sort pills; **Expand all**
+  walks the tree loading children on demand and skips directories the probe
+  found absent, and selecting any filter other than "All" auto-expands the
+  tree so the matched files are visible.
+- **"To EF filter"** cross-link: each file-backed service row in the
+  SST/UST/IST/EST decoded editors carries a compact glyph that narrows the
+  file-tree filter to exactly that service's files.
+
 ## [3.39.0] — 2026-10-26
 
 ### Added
diff --git a/frontend/index.html b/frontend/index.html
index b8b5b0c..feca927 100644
--- a/frontend/index.html
+++ b/frontend/index.html
@@ -1989,7 +1989,7 @@
 // ===== Version =====
 // Single source of truth for the PWA version: shown in the header and used
 // by the server version check in pysimConnect().
-const SIMPLE_VERSION = '3.39.0';
+const SIMPLE_VERSION = '3.40.0';
 document.getElementById('app-version').textContent = 'v' + SIMPLE_VERSION;
 
 // ===== view history (the browser Back/Forward buttons) =====
diff --git a/frontend/sw.js b/frontend/sw.js
index a925618..a0d6f93 100644
--- a/frontend/sw.js
+++ b/frontend/sw.js
@@ -1,4 +1,4 @@
-const CACHE = 'simple-v484';
+const CACHE = 'simple-v485';
 const URLS = [
   'index.html',
   'help.html',
diff --git a/pyproject.toml b/pyproject.toml
index 37800f5..bf2a989 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -4,7 +4,7 @@ build-backend = "setuptools.build_meta"
 
 [project]
 name = "pysim-simple-server"
-version = "3.39.0"
+version = "3.40.0"
 description = "HTTP REST server wrapping pysim for the SIMple PWA"
 license = { text = "GPL-2.0-or-later" }
 requires-python = ">=3.9"
diff --git a/pysim_simple_server/server.py b/pysim_simple_server/server.py
index 1e21e4b..d6a16e8 100644
--- a/pysim_simple_server/server.py
+++ b/pysim_simple_server/server.py
@@ -37,7 +37,7 @@ from osmocom.tlv import BER_TLV_IE
 from osmocom.utils import rpad
 
 
-VERSION = '3.39.0'
+VERSION = '3.40.0'
 
 MAX_ENVELOPE_SEGMENTS = 5  # max SMS segments for outgoing C-APDU in ENVELOPE