Hi there! I see you're encountering an "invalid state" error when trying to open ibis Paint. To better assist you, could you tell me a bit more about when exactly this error appears? For example, does it happen right when launching the app or when performing a specific action like opening a file or project?

Meanwhile, let me guide you through some general steps that often help fix this kind of error on Windows:

1. Restart the App and Your Device
Sometimes temporary glitches cause the app to get into an invalid state. Please close ibis Paint completely, then restart your Windows device before reopening the app.

2. Check for App Updates
Ensure you have the latest version of ibis Paint installed, as updates often fix bugs related to state errors.

3. Clear Cache or Temporary Data
On Windows, ibis Paint stores cache files that might cause state errors if corrupted. Try clearing cache or temporary data:
- Close the app.
- Navigate to the app’s data folder (usually in your user AppData location). If you need help finding it, I can guide you through.
- Delete cache files or folders related to ibis Paint.
- Restart the app.

4. Reinstall ibis Paint
If the above doesn’t help, uninstall ibis Paint, then download and reinstall the latest version from the official source. This refreshes all app files and settings.

5. Check Your Files
If the error appears when opening a specific file or project, the file might be corrupted. Try opening a different file or create a new project to see if the issue persists.

If you've tried any of these steps already or the problem occurs in a specific scenario, please let me know so I can suggest more targeted solutions!

Are you ready to start with these, or is there any additional detail you could share about when this happens?