If you are using Adobe Captivate 9 or 9.0.421, and witnessing frequent crashes on starting the product or even while working with a feature, follow the steps below to fix the issues.
If you frequently encounter "Captivate not responding" pop-up messages, upgrade to Captivate 188.8.131.527.
Download build 437 from Captivate downloads.
Reset your preferences back to default. Delete or rename the Captivate Preferences folder in your OS user profile.
For example, in Windows 7, the Preferences folder is located at:
Restart Captivate. For more information, refer this thread.