unable to open iBooks Author

Hello there, BaroLoh.

It sounds like iBooks Author won't open after you performed a duplication action. The following article provides some information on how to launch an app in Mac OS X without it opening previous windows/documents:

Automatically re-open windows, apps, and documents on your Mac

When you open and quit an app

When you open an app, it automatically re-opens the windows you were working with the last time you quit the app. If you don't want apps to automatically re-open documents and windows, select "Close windows when quitting an application" (OS X Mountain Lion v10.8 and later) or deselect "Restore windows when quitting and re-opening apps" (OS X Lion v10.6) from the General pane of System Preferences.

If an app continues to re-open its documents and windows when this feature is turned off, check the app's preferences for a similar feature. Some apps have their own setting for restoring windows.

To temporarily prevent an app from re-opening its documents and windows, hold the Shift key while you open the app.

Thanks for reaching out to Apple Support Communities and let us know if that helps.

Kind Regards.

Hello again, BaroLoh.

Thanks for your follow up and for providing more clarification on what behavior you are seeing. Since these initial steps didn't help, this Knowledge Base article provides some good explanation and next steps to follow with testing in another user on your Mac:

How to test an issue in another user account on your Mac

Before trying another user account

If you're seeing unexpected behavior on your Mac try these steps first:

Try searching Apple's knowledge base for the specific symptom or alert message you're seeing. There might be simpler steps you can take to resolve the issue.

Try starting your Mac in Safe Mode. Restart your computer. Hold the Shift key when you hear the startup sound. Release the Shift key when you see the Apple logo appear. This starts your Mac in Safe Mode. Safe mode performs a directory check of your startup disk, and removes some cache data. After your Mac finishes starting up, restart your Mac normally (without holding the Shift key) and see if the issue is resolved.

Make sure your software is up to date. The issue you're seeing might be addressed by installing available updates.

Check to see where the issue happens. If an issue appears before you see your desktop, it's less likely that it's related to a user account or setting. If an issue happens with a website, see if pages from other websites load correctly first. There might be an issue with the site and not your Mac.

After you've reviewed these recommendations proceed with the "How to test with another user account" and depending on the results you see:

If an issue happens in only one user account

If performing the same steps in a test user account doesn't result in the same unexpected behavior, you most likely don't need to reinstall any apps or OS X.

• If an issue only happens in one app, check the app's documentation or support website for instructions on troubleshooting specific preference or setting files.
• If you need help with a specific alert message or issue, search the Apple Support website for the text of the alert message you're seeing.

If an issue happens in more than one user account

If the same unexpected behavior happens in more than one user account on your Mac, try checking for software or hardware issues.

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Get help

If you need more help with a software or hardware issue, contact Apple Support. If you work with an Advisor, Genius, or service provider to resolve an issue, be sure to mention any steps you've already tried and the results. Also mention any alert messages you've seen as part of the issue. You can take a screenshot of any messages that appear so you can refer to them later.

Sincerely.

Hello again, Berthold.

You're very welcome. I'm glad the information proved to be useful in helping you find a solution.

Sincerely.