I tried right-clicking the launcher button and going "Lock to Launcher" while it's running and it does create an icon but clicking it to launch the program does nothing. Also searching for celtx in the Dash doesn't find the app.
This tutorial: How to Install Celtx 2.9.7 on Ubuntu Linux might help people in the future, as I found it very brief and clear. Just pay attention to your download path: If your Celtx install archive is not in the default Downloads folder, type it in manually.
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