Associated documentation:

Version History

Workflows Wizard

Steps:

1. 
   
2. Open artifacts page of a list
   
3. Edit the workflow
   1. 
      
   2. It will open the latest version of the deployed workflow
      
       
   
   
4. File -> Open from Workflow library
   
    

4. 
   
5. You will see all workflows
   
    

5. 
   
6. Click on History of the current workflow. It’s important that you only open the workflow of that list. If you open another workflow, it might corrupt the references.
   
    

6. 
   
7. Chose the version that you want to open
   
8. Make changes to the workflow and deploy and it will become the current default version