Hi there! I’m Charlotte, and I’m here to help you with the Woodoku app closing unexpectedly right after start on your Mac running OS X 10.15.7. That sounds really inconvenient! To better assist you, could you tell me if this happens every time you launch the app? Also, have you tried any fixes so far, like restarting your Mac or reinstalling the app?

While I wait for your details, here’s a step-by-step plan we can try together:

1. Force Quit Woodoku and Restart
- Click the Apple menu on the top-left of your screen and choose "Force Quit."
- Select Woodoku and click "Force Quit."
- Afterward, try opening the app again.

2. Check for Updates
- Open the App Store on your Mac and check if there’s any update available for Woodoku. Sometimes app crashes stem from incompatibilities resolved in updates.

3. Reinstall Woodoku
- Delete the app by dragging Woodoku from your Applications folder to the Trash.
- Empty the Trash.
- Re-download and install Woodoku from the App Store.

4. Check Your Internet Connection
- Woodoku might need an active internet connection for startup. So make sure your Mac is online and your connection is stable.

5. Clear Corrupted App Data if Possible
- Sometimes app data can get corrupted. You could try deleting Woodoku’s cache or preference files (though this might remove saved progress unless it’s synced online). In your Finder, try going to:
~/Library/Containers/
and find any folder related to Woodoku to remove.

Could you please let me know if you get any error messages when it closes, or if the app stays open for just a second before cutting out? That info will help narrow down the cause. I’ll be standing by until then!