You can view your Checklists from:
Checklists and Reports - Checklists - View Saved Checklists - select the checklist to open - click on "Open":
Your checklist will open in Creator window from where you can edit it:

Another option to view your saved checklist templates and saved checklists is from Library - Checklists - choose folder Saved Checklists or Checklist templates:

From here you Checklist will open in Viewer window- you can't edit or change it:

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