diff --git a/apps/desktop/resources/installer.nsh b/apps/desktop/resources/installer.nsh
index 092f641c3359f..7f277fdcbf9c2 100644
--- a/apps/desktop/resources/installer.nsh
+++ b/apps/desktop/resources/installer.nsh
@@ -1,3 +1,35 @@
+!include "StrFunc.nsh"
+!ifdef BUILD_UNINSTALLER
+  ${UnStrRep}
+  !define T3StrRep '${UnStrRep}'
+!else
+  ${StrRep}
+  !define T3StrRep '${StrRep}'
+!endif
+
+!macro customAppRunningMessages
+  Push $0
+  Push $1
+  ${If} $IsPowerShellAvailable == 0
+    System::Call 'kernel32::SetEnvironmentVariable(t "T3CODE_INSTALL_DIR", t "$INSTDIR")'
+    nsExec::ExecToStack `"$PowerShellPath" -NoProfile -NonInteractive -C "Get-CimInstance -ClassName Win32_Process | Where-Object { $$_.ExecutablePath -and [IO.Path]::GetDirectoryName($$_.ExecutablePath) -eq $$env:T3CODE_INSTALL_DIR } | ForEach-Object { [IO.Path]::GetFileNameWithoutExtension($$_.ExecutablePath) } | Where-Object { $$_ -in 'T3 Code (Alpha)', 'T3 Code (Beta)', 'T3 Code (Nightly)' } | Select-Object -First 1 | ForEach-Object { [Console]::Write($$_) }"`
+    Pop $0
+    Pop $1
+    System::Call 'kernel32::SetEnvironmentVariable(t "T3CODE_INSTALL_DIR", p 0)'
+    ${If} $0 == 0
+      ${If} $1 == "T3 Code (Alpha)"
+      ${OrIf} $1 == "T3 Code (Beta)"
+      ${OrIf} $1 == "T3 Code (Nightly)"
+        ${T3StrRep} $appRunningMessage $appRunningMessage "${PRODUCT_NAME}" $1
+        ${T3StrRep} $appClosingMessage $appClosingMessage "${PRODUCT_NAME}" $1
+        ${T3StrRep} $appCannotBeClosedMessage $appCannotBeClosedMessage "${PRODUCT_NAME}" $1
+      ${EndIf}
+    ${EndIf}
+  ${EndIf}
+  Pop $1
+  Pop $0
+!macroend
+
 !macro customInstall
   !ifndef DO_NOT_CREATE_START_MENU_SHORTCUT
     ${IfNot} ${FileExists} "$newStartMenuLink"
diff --git a/patches/app-builder-lib@26.16.1.patch b/patches/app-builder-lib@26.16.1.patch
index 72655d9f0a62d..9df8acd7ab800 100644
--- a/patches/app-builder-lib@26.16.1.patch
+++ b/patches/app-builder-lib@26.16.1.patch
@@ -13,3 +13,51 @@ index 8a3462b185b078a260483635e6d774e2ece6e269..105778c145ab63a26444179215c643a7
              try {
                  await nsisUtil_1.UninstallerReader.exec(installerPath, uninstallerPath);
              }
+diff --git a/templates/nsis/include/allowOnlyOneInstallerInstance.nsh b/templates/nsis/include/allowOnlyOneInstallerInstance.nsh
+--- a/templates/nsis/include/allowOnlyOneInstallerInstance.nsh
++++ b/templates/nsis/include/allowOnlyOneInstallerInstance.nsh
+@@ -103,6 +103,9 @@
+ !macroend
+
+ !macro _CHECK_APP_RUNNING
++  Var /GLOBAL appRunningMessage
++  Var /GLOBAL appClosingMessage
++  Var /GLOBAL appCannotBeClosedMessage
+   ${GetProcessInfo} 0 $pid $1 $2 $3 $4
+   ${if} $3 != "${APP_EXECUTABLE_FILENAME}"
+     ${if} ${isUpdated}
+@@ -112,17 +115,23 @@
+
+     !insertmacro FIND_PROCESS "${APP_EXECUTABLE_FILENAME}" $R0
+     ${if} $R0 == 0
++      StrCpy $appRunningMessage "$(appRunning)"
++      StrCpy $appClosingMessage "$(appClosing)"
++      StrCpy $appCannotBeClosedMessage "$(appCannotBeClosed)"
++      !ifmacrodef customAppRunningMessages
++        !insertmacro customAppRunningMessages
++      !endif
+       ${if} ${isUpdated}
+         # allow app to exit without explicit kill
+         Sleep 1000
+         Goto doStopProcess
+       ${endIf}
+-      MessageBox MB_OKCANCEL|MB_ICONEXCLAMATION "$(appRunning)" /SD IDOK IDOK doStopProcess
++      MessageBox MB_OKCANCEL|MB_ICONEXCLAMATION "$appRunningMessage" /SD IDOK IDOK doStopProcess
+       Quit
+
+       doStopProcess:
+
+-      DetailPrint "$(appClosing)"
++      DetailPrint "$appClosingMessage"
+
+       !insertmacro KILL_PROCESS "${APP_EXECUTABLE_FILENAME}" 0
+       # to ensure that files are not "in-use"
+@@ -153,7 +162,7 @@
+         # App likely running with elevated permissions.
+         # Ask user to close it manually
+         ${if} $R1 > 1
+-          MessageBox MB_RETRYCANCEL|MB_ICONEXCLAMATION "$(appCannotBeClosed)" /SD IDCANCEL IDRETRY loop
++          MessageBox MB_RETRYCANCEL|MB_ICONEXCLAMATION "$appCannotBeClosedMessage" /SD IDCANCEL IDRETRY loop
+           Quit
+         ${else}
+           Goto loop
diff --git a/pnpm-lock.yaml b/pnpm-lock.yaml
index 91c27d37762d3..9cf8a3f0c53b1 100644
--- a/pnpm-lock.yaml
+++ b/pnpm-lock.yaml
@@ -372,7 +372,7 @@ patchedDependencies:
   '@react-native-menu/menu@2.0.0': 910ec1bf22aa85a96fcf12299cd823bc30f702dd9b2d77b564d10b9ed709f7f6
   '@react-navigation/native-stack@7.21.0': 990d575444c4af2ce8218b3b7a8280fe244c03abbdb32b822a2e862f791dbf42
   alchemy@2.0.0-beta.84: 824006659fa28ca31e490ce1fc3611f77436005ce9fa0f638be46564133cf042
-  app-builder-lib@26.16.1: a28c2dfcfc2b90d6c6247e199e6537391db9ecd941854c650910d607442512d3
+  app-builder-lib@26.16.1: 0fbe9ae51783f5768ebe197d12d1fdb7d477a08c92e5db2f6356bcce62613c53
   dbus-next@0.10.2: cfff57561b0ee59b5addb3b2e6c6f20906e967507a530ab67e8db8108e520ba4
   expo-audio@58.0.9: 530af071088a809fe1a97ce2b2269c78335fbb5dcd3893d6937ff5c304c85a0a
   expo-modules-core@58.0.22: f0b0fd100550ed76e5c25b4d13eb7c9ff62825f8f197c53edf7bf447c50c9fb7
@@ -17176,7 +17176,7 @@ snapshots:
 
   anynum@1.0.1: {}
 
-  app-builder-lib@26.16.1(patch_hash=a28c2dfcfc2b90d6c6247e199e6537391db9ecd941854c650910d607442512d3)(dmg-builder@26.16.1)(electron-builder-squirrel-windows@26.16.1)(supports-color@8.1.1):
+  app-builder-lib@26.16.1(patch_hash=0fbe9ae51783f5768ebe197d12d1fdb7d477a08c92e5db2f6356bcce62613c53)(dmg-builder@26.16.1)(electron-builder-squirrel-windows@26.16.1)(supports-color@8.1.1):
     dependencies:
       '@electron/asar': 3.4.1
       '@electron/fuses': 1.8.0
@@ -18026,7 +18026,7 @@ snapshots:
 
   dmg-builder@26.16.1(electron-builder-squirrel-windows@26.16.1)(supports-color@8.1.1):
     dependencies:
-      app-builder-lib: 26.16.1(patch_hash=a28c2dfcfc2b90d6c6247e199e6537391db9ecd941854c650910d607442512d3)(dmg-builder@26.16.1)(electron-builder-squirrel-windows@26.16.1)(supports-color@8.1.1)
+      app-builder-lib: 26.16.1(patch_hash=0fbe9ae51783f5768ebe197d12d1fdb7d477a08c92e5db2f6356bcce62613c53)(dmg-builder@26.16.1)(electron-builder-squirrel-windows@26.16.1)(supports-color@8.1.1)
       builder-util: 26.16.0(supports-color@8.1.1)
       fs-extra: 10.1.0
       js-yaml: 4.3.2
@@ -18119,7 +18119,7 @@ snapshots:
 
   electron-builder-squirrel-windows@26.16.1(dmg-builder@26.16.1)(supports-color@8.1.1):
     dependencies:
-      app-builder-lib: 26.16.1(patch_hash=a28c2dfcfc2b90d6c6247e199e6537391db9ecd941854c650910d607442512d3)(dmg-builder@26.16.1)(electron-builder-squirrel-windows@26.16.1)(supports-color@8.1.1)
+      app-builder-lib: 26.16.1(patch_hash=0fbe9ae51783f5768ebe197d12d1fdb7d477a08c92e5db2f6356bcce62613c53)(dmg-builder@26.16.1)(electron-builder-squirrel-windows@26.16.1)(supports-color@8.1.1)
       builder-util: 26.16.0(supports-color@8.1.1)
       electron-winstaller: 5.4.0(supports-color@8.1.1)
     transitivePeerDependencies:
@@ -18128,7 +18128,7 @@ snapshots:
 
   electron-builder@26.16.1(electron-builder-squirrel-windows@26.16.1)(supports-color@8.1.1):
     dependencies:
-      app-builder-lib: 26.16.1(patch_hash=a28c2dfcfc2b90d6c6247e199e6537391db9ecd941854c650910d607442512d3)(dmg-builder@26.16.1)(electron-builder-squirrel-windows@26.16.1)(supports-color@8.1.1)
+      app-builder-lib: 26.16.1(patch_hash=0fbe9ae51783f5768ebe197d12d1fdb7d477a08c92e5db2f6356bcce62613c53)(dmg-builder@26.16.1)(electron-builder-squirrel-windows@26.16.1)(supports-color@8.1.1)
       builder-util: 26.16.0(supports-color@8.1.1)
       builder-util-runtime: 9.7.0(supports-color@8.1.1)
       chalk: 4.1.2