If you have not completed an action that depends on a system dialog, the buttons on the toolbar may remain disabled.
For example, if you wanted to generate an HTML report, export a diagram to PDF, or generate a script, the system dialog was displayed during this action. If you did not close this system dialog or did not complete the action, just complete it or close the dialog. This will reactivate the toolbar buttons.
If you are not sure if any of the system dialogs are still active, close the application and restart it.
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