If Snag-It is having problem, technical support sent the following steps to fix it.
Jason L. (TechSmith Support)
Thank you for contacting us. If you have any custom QuickStyles you would like to keep, please open Snagit and browse to the file menu Snagit > Export Styles...
Remove com.techsmith.snagit.plist
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1.) Close Snagit and confirm its not running by accessing Activity Monitor. Look for Snagit in the running list of applications.
2.) Click on your Finder and then click the Go menu at the top. Hold down the Option key on your keyboard and choose the Library item in the Go dropdown. Then go to Preferences.
3.) Locate all com.techsmith.snagit.plist files and move them to your trash (there may be one with a 4 in it too)
4.) Confirm that com.techsmith.snagit.plist is no longer in the Preferences folder.
5.) Reboot the computer and try Snagit again.
Please let me know if you have any questions.
Kind Regards,
Jason
Technical Support Specialist