To add a new version of a workflow to the Web Client please click on on the burger menu (top left) and select Workflows.
This will bring up a list of all workflows available on the team:
To add a new version of a workflow select the relevant workflow from the list in order to bring up the workflow details panel.
To add a new version of the workflow, click on ADD NEW VERSION then “drag and drop” or browse your directory to add your workflow ZIP file to the panel.
Once the workflow has been added, you can adjust the Workflow Name if needed and add your Version Notes. You can also select the Mode - Live/Draft/Approval.
Hit CREATE to upload the new version.