diff --git a/docs/umu.1.scd b/docs/umu.1.scd
index 0449b30f..9003f573 100644
--- a/docs/umu.1.scd
+++ b/docs/umu.1.scd
@@ -166,7 +166,8 @@ _UMU_ZENITY_
 _UMU_RUNTIME_UPDATE_
 	Optional. Disables automatic updates to the *Steam Linux Runtime*[6].
 
-	Set _0_ to disable updates.
+	Set _0_ to disable updates. Set _1_ to force updates and restore
+	_$HOME/.local/share/umu_ to clean state.
 
 # SEE ALSO
 
diff --git a/umu/umu_runtime.py b/umu/umu_runtime.py
index a2578470..29f98834 100644
--- a/umu/umu_runtime.py
+++ b/umu/umu_runtime.py
@@ -23,7 +23,7 @@
 
 from umu.umu_consts import CONFIG, UMU_CACHE, UMU_LOCAL
 from umu.umu_log import log
-from umu.umu_util import find_obsolete, https_connection, run_zenity
+from umu.umu_util import https_connection, run_zenity
 
 try:
     from tarfile import tar_filter
@@ -210,7 +210,28 @@ def setup_umu(
         log.debug("Runtime Platform updates disabled")
         return
 
-    find_obsolete()
+    # Force a runtime update
+    if os.environ.get("UMU_RUNTIME_UPDATE") == "1":
+        lock: FileLock = FileLock(f"{local}/umu.lock")
+        log.debug("Forcing update to Runtime Platform")
+        log.debug("Acquiring file lock '%s'...", lock.lock_file)
+        with lock:
+            log.debug("Acquired file lock '%s'", lock.lock_file)
+            for path in local.glob("*"):
+                if path.is_dir():
+                    log.debug("Removing: %s", path)
+                    rmtree(str(path))
+                if path.is_file() and not path.name.endswith(".lock"):
+                    log.debug("Removing: %s", path)
+                    path.unlink()
+        with https_connection(host) as client_session:
+            _restore_umu(
+                json,
+                thread_pool,
+                lambda: local.joinpath("umu").is_file(),
+                client_session,
+            )
+        return
 
     with https_connection(host) as client_session:
         _update_umu(local, json, thread_pool, client_session)
diff --git a/umu/umu_util.py b/umu/umu_util.py
index f3bc1c57..26073ca8 100644
--- a/umu/umu_util.py
+++ b/umu/umu_util.py
@@ -12,7 +12,6 @@
 
 from Xlib import display
 
-from umu.umu_consts import STEAM_COMPAT, UMU_LOCAL
 from umu.umu_log import log
 
 ssl_context: SSLContext | None = None
@@ -173,38 +172,6 @@ def is_winetricks_verb(
     return True
 
 
-def find_obsolete() -> None:
-    """Find obsoleted launcher files and log them."""
-    home: Path = Path.home()
-    obsoleted: set[str] = {
-        "reaper",
-        "sniper_platform_0.20240125.75305",
-        "BUILD_ID.txt",
-        "umu_version.json",
-        "sniper_platform_0.20231211.70175",
-    }
-
-    # Obsoleted files in $HOME/.local/share/umu from RC4 and below
-    for file in UMU_LOCAL.glob("*"):
-        is_umu_file: bool = file.name.endswith(".py") and (
-            file.name.startswith(("umu", "ulwgl"))
-        )
-        if is_umu_file or file.name in obsoleted:
-            log.warning("'%s' is obsolete", file)
-
-    # $HOME/.local/share/Steam/compatibilitytool.d
-    if (launcher := STEAM_COMPAT.joinpath("ULWGL-Launcher")).is_dir():
-        log.warning("'%s' is obsolete", launcher)
-
-    # $HOME/.cache
-    if (cache := home.joinpath(".cache", "ULWGL")).is_dir():
-        log.warning("'%s' is obsolete", cache)
-
-    # $HOME/.local/share
-    if (ulwgl := home.joinpath(".local", "share", "ULWGL")).is_dir():
-        log.warning("'%s' is obsolete", ulwgl)
-
-
 @contextmanager
 def https_connection(host: str):  # noqa: ANN201
     """Create an HTTPSConnection."""