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- Click Start, type Control Panel.
- Click Uninstall a program.
- Select Expression Web 4 from the list.
- Click Repair or Uninstall/Change,
click Continue, click Repair.
or
can see this link will help https://learn.microsoft.com/en-us/visualstudio/workflow-designer/how-to-use-the-expression-editor?view=vs-2022