diff --git a/RELEASE_README.md b/RELEASE_README.md
index d4940f6..0333f7f 100644
--- a/RELEASE_README.md
+++ b/RELEASE_README.md
@@ -1,6 +1,6 @@
 # PristonTale EU for Linux
 
-Version 0.8.3 installs, updates, repairs, and launches PristonTale EU through a
+Version 0.8.5 installs, updates, repairs, and launches PristonTale EU through a
 native Linux dashboard. Game files come directly from the publisher and are not
 included in this archive.
 
@@ -15,11 +15,11 @@ Then run:
 ```text
 openssl pkey -pubin -in launcher-update-public.pem -outform DER | sha256sum
 openssl dgst -sha256 -verify launcher-update-public.pem \
-  -signature pristontale-eu-linux-installer-v0-8-3.tar.gz.sig \
-  pristontale-eu-linux-installer-v0-8-3.tar.gz
-sha256sum -c pristontale-eu-linux-installer-v0-8-3.tar.gz.sha256
-tar -xzf pristontale-eu-linux-installer-v0-8-3.tar.gz
-cd pristontale-eu-linux-installer-v0-8-3
+  -signature pristontale-eu-linux-installer-v0-8-5.tar.gz.sig \
+  pristontale-eu-linux-installer-v0-8-5.tar.gz
+sha256sum -c pristontale-eu-linux-installer-v0-8-5.tar.gz.sha256
+tar -xzf pristontale-eu-linux-installer-v0-8-5.tar.gz
+cd pristontale-eu-linux-installer-v0-8-5
 ./install.sh
 ```
 
@@ -56,6 +56,7 @@ The main launcher button automatically shows **Install**, **Update**, or
 pristontale-eu --help                         Show all commands and options
 pristontale-eu gui                            Open the native dashboard
 pristontale-eu doctor                         Check required host components
+pristontale-eu runtime-bootstrap              Prepare the verified UMU helper
 pristontale-eu login-diagnostics              Check the login route without credentials
 pristontale-eu login-diagnostics --runtime proton7
                                                Compare the direct-Proton prefix read-only
diff --git a/ptlinux/__init__.py b/ptlinux/__init__.py
index 90fca5d..db04b37 100644
--- a/ptlinux/__init__.py
+++ b/ptlinux/__init__.py
@@ -4,4 +4,4 @@ from .paths import AppPaths
 
 __all__ = ["AppPaths", "__version__"]
 
-__version__ = "0.8.3"
+__version__ = "0.8.5"
diff --git a/pyproject.toml b/pyproject.toml
index 3963d69..0f368f9 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -1,6 +1,6 @@
 [project]
 name = "PTEU-Linux-Launcher"
-version = "0.8.3"
+version = "0.8.5"
 description = "PristonTale EU Linux installer, clean launcher, and diagnostic harness"
 requires-python = ">=3.11"
 dependencies = []
diff --git a/updates/stable.json b/updates/stable.json
index 84d871f..116f9d8 100644
--- a/updates/stable.json
+++ b/updates/stable.json
@@ -1,11 +1,11 @@
 {
-  "archive_sha256": "dfaddcbda762eaf34fd80f9592d6173176cfbd41189a96fae023f5459fd6492d",
-  "archive_size": 260645,
-  "archive_url": "https://git.m4ko.net/m4ko/pristontale-eu-linux/releases/download/v0.8.3/pristontale-eu-linux-update-v0.8.3.tar.gz",
+  "archive_sha256": "d857cf75f899a42cc04be9547bdae4ac0e9c5c52ab916ebb1112954b76d876d9",
+  "archive_size": 268602,
+  "archive_url": "https://git.m4ko.net/m4ko/pristontale-eu-linux/releases/download/v0.8.5/pristontale-eu-linux-update-v0.8.5.tar.gz",
   "channel": "stable",
   "minimum_updater_version": "0.5.0",
-  "notes_url": "https://git.m4ko.net/m4ko/pristontale-eu-linux/releases/tag/v0.8.3",
-  "published_at": "2026-09-01T20:24:03Z",
+  "notes_url": "https://git.m4ko.net/m4ko/pristontale-eu-linux/releases/tag/v0.8.5",
+  "published_at": "2026-09-02T19:44:49Z",
   "schema": 1,
-  "version": "0.8.3"
+  "version": "0.8.5"
 }
diff --git a/updates/stable.json.sig b/updates/stable.json.sig
index 69ab1d0..2d71c2d 100644
Binary files a/updates/stable.json.sig and b/updates/stable.json.sig differ