Upgrade Code

Every time a new version of the app is released on CodeCanyon, you can download it for free — updates are included for life. This page walks you through moving your project to a newer version without losing any of your work.

The idea is simple: back up the handful of files that contain your customisations, replace the rest of the project with the new version, then put your files back.

1. 01
   Back up your files Copy your .env, Firebase files, signing key and custom assets to a safe folder.
2. 02
   Download the new version Grab the latest ZIP from your CodeCanyon Downloads page.
3. 03
   Unzip into a new folder Extract to a fresh folder — never on top of your existing project.
4. 04
   Restore your saved files Copy each backed-up file into the same location inside the new project.
5. 05
   Test that it still works Run flutter pub get, launch the app, and verify every feature still works.

Why you need to back up first

When you unzip a new version of the app, everything in the old project folder gets replaced with the fresh code. If you skip the backup step, you will lose:

• Your environment file — the .env file that stores your Firebase, AdMob, AppLovin and other keys. Without it, the app has nothing to connect to.
• Your Firebase files — the small files Firebase generated for your project. Without them, Firebase services stop working.
• Your Android signing key — the file that proves your app is yours. Without it, Google Play will refuse any future update, because the key won't match the one you originally published with. This one is critical.
• Any custom assets you've swapped in — app icon, images, animations, splash screen, etc.
• Any trivia data you've edited — the questions, categories, or logo images specific to your app.

None of this is stored on the internet. If you lose these files locally, they're gone.

Step 1 — Back up your files

Before touching anything else, create a folder somewhere safe (outside the project folder) — for example, on your Desktop or in a cloud-synced folder like Dropbox / Google Drive — and copy the following files into it from your current project:

Tip. The safest habit is to keep this backup folder up to date all the time, not just at upgrade time. Every time you change something important — a key, an icon, the signing key — copy the file to your backup folder immediately. If your computer ever fails, you'll thank yourself.

Step 2 — Download the new version

1. Open CodeCanyon and sign in with the account you bought the app with.
2. Go to your Downloads page and find Logo Quiz in the list.
3. Click Download → All files & documentation to get the new ZIP.

Step 3 — Unzip the new version

Unzip the download into a brand new folder — don't unzip it on top of the old project. Naming the new folder with the version number (for example logo-quiz-v1.3/) makes it easy to keep track of which version you're on.

Once unzipped, you can safely rename or archive your old project folder — you'll be working from the new one from now on.

Step 4 — Put your saved files back

Open your backup folder from Step 1 and copy each file into the same location inside the new project folder. For example:

• .env → root of the new project
• google-services.json → android/app/
• GoogleService-Info.plist → ios/Runner/
• keystore.jks → android/app/
• …and so on.

If a file with the same name already exists in the new project, replace it with your backed-up copy.

Step 5 — Test that it still works

Open a terminal in the new project folder and run:

flutter pub get

This tells Flutter to fetch all the dependencies the new version needs. Then run the app on a device or emulator (see Publishing → Build & Publish for the full walkthrough) and make sure:

• The app launches without errors.
• Firebase-powered features (analytics, sign-in, etc.) still work.
• Ads and in-app purchases still appear correctly.
• Your custom icon, images and trivia data are intact.

If everything looks good, you're done — the app is now on the new version.

Upgrading Flutter itself

Sometimes a new release of the app requires a newer version of Flutter. To update Flutter on your computer to the latest stable version, run:

flutter upgrade

If a Flutter update introduces something you need to be aware of, the release notes on CodeCanyon will call it out.

Something went wrong?

If the new version won't build or the app crashes on startup:

1. Double-check that all the files listed in Step 1 were copied back to the correct locations.
2. Run flutter clean in the project folder, then flutter pub get again — this clears any leftover build files from the old version.