If your SimpleMind mind map is freezing and you are unable to edit it, follow these steps for troubleshooting:

1. Check Zoom Level: Sometimes, the mind map may enter a read-only state if it is zoomed out too far. Make sure to zoom in to a manageable level. To do this, either use the zoom controls in the application or pinch to zoom on trackpads or touch devices. This may allow you to regain editing access - learn more.

2. Restart the Application: Close SimpleMind completely and restart it. This can often resolve temporary glitches or freezes.

3. Update SimpleMind: Ensure your SimpleMind application is up to date. An outdated version could lead to bugs or issues. Go to the app store or the SimpleMind website to download the latest version.

4. Reinstall the Application: If the problem persists, consider uninstalling and then reinstalling SimpleMind. This can fix any corrupted files that might be causing the freeze - learn more.

5. Check Installation Method: If you installed SimpleMind through a third-party app or store, consider uninstalling it and reinstalling from the official source (like the Google Play Store or the SimpleMind website). Non-official versions can sometimes lead to functionality issues - learn more.

6. Contact Support: If nothing seems to work, reach out to SimpleMind support. They may have more specific guidance based on your version and context. You can contact them through their support page - learn more.

Following these steps should help resolve the freezing issue and restore your ability to edit your mind maps in SimpleMind.