Adobe Illustrator bounces once then doesn't open

Hi Bryan,

Sorry to hear about this experience. I would request if you could share a few more detail like:

• OS and version of Illustrator
• When did this start happening? Are there any recent changes made to your system? For example, any antivirus, system updates or web extensions installed recently.
• Do you have any third party plugins or fonts installed?
• Does it gives any crash report? If yes, share crash logs by following these steps   (https://helpx.adobe.com/in/illustrator/kb/crash-next-steps.html ). While submitting the crash report please use the same email address, with which you are signed in on this community. This will help us find the crash report and help accordingly. 

You may also try resetting Illustrator preferences. Preference settings are saved each time you quit the application. Crashing and unexpected behavior in application can be caused due to corrupt/ damaged preferences. Please follow these steps and let us know how it goes: 

For MAC 

• Close all Adobe applications. 
• Go to locations 
• ~/Library/Caches 
• ~/Library/Application Support/Adobe 
• ~/Library/Preferences 
• Rename  Adobe Illustrator, com.adobe.illustrator and Adobe Illustrator (Version#) Settings folders to   Adobe Illustrator.old, com.adobe.illustrator.old and Adobe Illustrator (Version#) Settings.old 
• Launch Illustrator from the Creative Cloud. 

For Windows 

• Close all Adobe applications. 
• Go to Location C:\Users\user\AppData\Roaming\Adobe 
• Rename  Adobe Illustrator and Adobe Illustrator (version#) Settings folders to Adobe Illustrator.old and Adobe Illustrator (Version#) Settings.old 
• Launch Illustrator from the Creative Cloud. 

Please note that resetting preferences will remove all the custom settings and Illustrator will launch with default settings. This way all your old settings will be saved in .old folders and Illustrator will recreate new folders with default settings.  

You may also try steps shared in this help article and share your observations with us. We'd be happy to help.

Regards,

Srishti