diff --git a/dzgui/api/shortcuts.py b/dzgui/api/shortcuts.py
index 03a691b..243946f 100644
--- a/dzgui/api/shortcuts.py
+++ b/dzgui/api/shortcuts.py
@@ -12,6 +12,7 @@ from typing import Any
 from dzgui.api.steam import find_user_id_32
 from dzgui.const.constants import APP_NAME, APP_NAME_LOWER, IMAGES_PATH
 from dzgui.util.dirs import copy_dzgui_to_xdg_data
+from dzgui.util.strings import unknown
 
 logger = logging.getLogger(APP_NAME)
 
@@ -46,6 +47,13 @@ class Shortcuts:
         wrapped_exe = f'"{exe}"'
         return appname + wrapped_exe
 
+    def find_appname_by_unsigned_id(self, appid: int) -> str:
+        # NOTE: bitmask signed int back to 32-bit CRC
+        for key in self.shortcuts["shortcuts"].keys():
+            if self.shortcuts["shortcuts"][key]["appid"] & 0xFFFFFFFF == appid:
+                return str(self.shortcuts["shortcuts"][key]["appname"])
+        return unknown
+
     def get_shortcuts(self) -> Any:
         return self.shortcuts
 
diff --git a/dzgui/api/steam.py b/dzgui/api/steam.py
index 99de2e6..9a1c67f 100644
--- a/dzgui/api/steam.py
+++ b/dzgui/api/steam.py
@@ -32,23 +32,25 @@ from dzgui.const.endpoints import (
 )
 from dzgui.strings import wizard
 from dzgui.util.bash import concat_bash_args
-from dzgui.util.strings import unknown
 
 logger = logging.getLogger(APP_NAME)
 
 
 class AppNotInstalledError(Exception):
     """App not present in user's libraryfolders"""
+
     pass
 
 
 class AppMovedError(Exception):
     """VDF points to a nonexistent location on disk"""
+
     pass
 
 
 class VDFLoadError(Exception):
     """Malformed VDF or JSON conversion"""
+
     pass
 
 
@@ -322,9 +324,12 @@ def get_running_app() -> int | None:
 
 
 def get_app_allows_downloads(path: Path, appid: int) -> bool:
-    root_path = get_app_path(path, appid)
-    acf = root_path.joinpath(f"steamapps/appmanifest_{appid}.acf")
-    flag = ACF(acf).get_allows_downloads()
+    try:
+        root_path = get_app_path(path, appid)
+        acf = root_path.joinpath(f"steamapps/appmanifest_{appid}.acf")
+        flag = ACF(acf).get_allows_downloads()
+    except AppNotInstalledError:
+        flag = 0
     match flag:
         # NOTE: adheres to global client setting
         case 0:
@@ -403,13 +408,13 @@ def get_app_path(folders_path: Path, appid: int) -> Path:
     return Path(app_path)
 
 
-def get_app_name(appid: int) -> str:
+def get_app_name(appid: int) -> str | None:
     payload = {"appids": [appid]}
     res = requests.get(APP_DETAILS, params=payload)
     if res.status_code != 200:
-        return unknown
+        return None
     try:
         return str(res.json()[str(appid)]["data"]["name"])
     except Exception as e:
         logger.debug(e)
-        return unknown
+        return None
diff --git a/dzgui/managers/connection.py b/dzgui/managers/connection.py
index 896969f..7ab03fd 100644
--- a/dzgui/managers/connection.py
+++ b/dzgui/managers/connection.py
@@ -9,6 +9,7 @@ from typing import TYPE_CHECKING
 
 import dzgui.api.pefile as PeFile
 import dzgui.api.servers as Servers
+from dzgui.api.shortcuts import Shortcuts
 
 from dzgui.api.steam import (
     connect,
@@ -175,6 +176,12 @@ class ConnectionManager:
         if running_app is not None:
             allows_dl = get_app_allows_downloads(steam_path, running_app)
             running_app_name = get_app_name(running_app)
+            # NOTE: for out-of-range appid, assume NSG.
+            # dzgui.api.steam.get_app_name() will return None
+            if running_app_name is None:
+                s = Shortcuts(steam_path)
+                # NOTE: returns "Unknown" if unparseable
+                running_app_name = s.find_appname_by_unsigned_id(running_app)
             allows_downloads = (allows_dl, running_app_name)
         else:
             allows_downloads = (True, "")
diff --git a/pyproject.toml b/pyproject.toml
index ebaca2d..f9a8350 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -4,7 +4,7 @@ description = "DayZ server browser and mod manager for Linux"
 authors = [
     {name = "aclist"}
 ]
-version = "7.0.0b16"
+version = "7.0.0b17"
 license = "GPL-3.0-or-later"
 license-files = ["LICENSE"]
 readme = "README.md"
diff --git a/tests/test_pefile.py b/tests/test_pefile.py
index 987888e..ebcfb0e 100644
--- a/tests/test_pefile.py
+++ b/tests/test_pefile.py
@@ -12,7 +12,7 @@ from dzgui.api.steam import (
 
 from dzgui.config.query import get_config
 from dzgui.config.xdg import get_xdg_paths, parse_filepaths
-from dzgui.const.constants import APPID_DAYZ, LIBRARYFOLDERS_PATH
+from dzgui.const.constants import APPID_DAYZ
 
 from tests.fixtures import fixture_path