diff --git a/pkgs/by-name/fl/flexoptix-app/allow-no-secret-manager.patch b/pkgs/by-name/fl/flexoptix-app/allow-no-secret-manager.patch
new file mode 100644
index 000000000000..30b676d8f403
--- /dev/null
+++ b/pkgs/by-name/fl/flexoptix-app/allow-no-secret-manager.patch
@@ -0,0 +1,9 @@
+--- app/node_modules/rme-electron/main/fo-storage/models/fo-storage-file.js
++++ app/node_modules/rme-electron/main/fo-storage/models/fo-storage-file.js
+@@ -25,6 +25,7 @@
+		if (!this.#isPlainObject(initialContent)) {
+			throw new Error("Content must be a plain object");
+		}
++		safeStorage.setUsePlainTextEncryption(true);
+		this.#content = initialContent;
+	}
diff --git a/pkgs/by-name/fl/flexoptix-app/disable-autoupdate.patch b/pkgs/by-name/fl/flexoptix-app/disable-autoupdate.patch
index d71133951e72..c3b2bdec8185 100644
--- a/pkgs/by-name/fl/flexoptix-app/disable-autoupdate.patch
+++ b/pkgs/by-name/fl/flexoptix-app/disable-autoupdate.patch
@@ -1,16 +1,12 @@
---- app/electron/jsComponents/mainWindowEvents.js	2024-02-18 12:53:41.115773007 -0500
-+++ app/electron/jsComponents/mainWindowEvents.js2	2024-02-18 23:22:20.003280203 -0500
-@@ -128,7 +128,12 @@
- 
- 	if (app.isPackaged) {
- 		global.mainWindow.webContents.once("did-finish-load", function () {
--			autoUpdater.checkForUpdates();
-+			global.mainWindow.loadURL(
-+				url.format({
-+					...global.APPLICATION_URL_OBJECT,
-+					slashes: true,
-+				}),
-+			);
- 		});
- 	} else {
- 		global.mainWindow.webContents.openDevTools();
+--- app/node_modules/electron-updater/out/AppUpdater.js
++++ app/node_modules/electron-updater/out/AppUpdater.js
+@@ -211,6 +211,9 @@
+      * Asks the server whether there is an update.
+      */
+     checkForUpdates() {
++        this.emit("update-not-available", null);
++        return true;
++
+         if (!this.isUpdaterActive()) {
+             return Promise.resolve(null);
+         }
diff --git a/pkgs/by-name/fl/flexoptix-app/package.nix b/pkgs/by-name/fl/flexoptix-app/package.nix
index 402f7cc52d0c..d37ec9824bff 100644
--- a/pkgs/by-name/fl/flexoptix-app/package.nix
+++ b/pkgs/by-name/fl/flexoptix-app/package.nix
@@ -3,29 +3,42 @@
   appimageTools,
   fetchurl,
   asar,
+  python3,
 }:
 let
   pname = "flexoptix-app";
-  version = "5.21.2-latest";
+  version = "5.48.0-latest";
 
   src = fetchurl {
     name = "${pname}-${version}.AppImage";
     url = "https://flexbox.reconfigure.me/download/electron/linux/x64/FLEXOPTIX%20App.${version}.AppImage";
-    hash = "sha256-BnNRwD09CE1EZDg3Hn3khN4FZ8Hj5LLAunk+NKU5BJo=";
+    hash = "sha256-VSGfExus+4dDef6V1ZEATMBVCIb0JS459+yolx5sg3c=";
   };
 
   udevRules = fetchurl {
     url = "https://www.flexoptix.net/static/frontend/Flexoptix/default/en_US/files/99-tprogrammer.rules";
-    hash = "sha256-faowRYdrk88WUpOpaEfedzybBgxVRZhvAaYP9HAuzAE=";
+    hash = "sha256-/1ZtJT+1IMyYqw3N0bVJ/T3vbmex169lzx+SlY5WsnA=";
   };
 
   appimageContents = (appimageTools.extract { inherit pname version src; }).overrideAttrs (oA: {
     buildCommand = ''
       ${oA.buildCommand}
 
-      # Get rid of the autoupdater
+      # Remove left-over node-gyp executable symlinks
+      # https://github.com/nodejs/node-gyp/issues/2713
+      find $out/ -type l -name python3 -exec ln -sf ${python3.interpreter} {} \;
+
+      # Extract app to make it patchable
       ${asar}/bin/asar extract $out/resources/app.asar app
+
+      # Fix app crash when none of these secret managers is available: https://www.electronjs.org/docs/latest/api/safe-storage#safestoragegetselectedstoragebackend-linux
+      patch -p0 < ${./allow-no-secret-manager.patch}
+      # Get rid of the autoupdater
       patch -p0 < ${./disable-autoupdate.patch}
+
+      # Makes debugging easier: cp -r app $out/_app
+
+      # Repackage
       ${asar}/bin/asar pack app $out/resources/app.asar
     '';
   });
@@ -42,7 +55,10 @@ appimageTools.wrapAppImage {
     install -Dm444 ${appimageContents}/flexoptix-app.desktop -t $out/share/applications
     install -Dm444 ${appimageContents}/flexoptix-app.png -t $out/share/pixmaps
     substituteInPlace $out/share/applications/flexoptix-app.desktop \
-      --replace 'Exec=AppRun' "Exec=$out/bin/${pname} --"
+      --replace-fail 'Exec=AppRun' "Exec=$out/bin/${pname} --"
+
+    # For debugging
+    [[ -e ${appimageContents}/_app ]] && ln -s ${appimageContents}/_app $out
 
     # Add udev rules
     mkdir -p $out/lib/udev/rules.d