Refer to screenshot from View, Content Template "Loop item in Program Chapter Horizontal List - Home" was the previous template used in this View. I don't need it anymore, I assigned another content template "Loop item in Column Horizontal List - Home" but I could not able to remove the previous one.
From the Content Template list, there is no checkbox for me to select and un-assign it.
I confirm all my Toolset plugins are the most up-to-date.
That content template will be removed from that list once you fully delete the related View which is currently Trashed.
You can fully remove the View in Views > Views > Trash.
Loop Item content templates are automatically deleted when you run the Loop wizard again and uncheck the checkbox "Use a Content Template to group the fields in this View loop".
Those only disappear / delete after you delete the related View fully.
Yes, I can delete the template if I delete the associated View, what if I want to change the template rather then remove the View? I want to have different template for my client review.
You can try to detach existing content template when you try to run the wizard again and uncheck the checkbox "Use a Content Template to group the fields in this View loop" on wizard's second step.
Please be aware that detaching a template means an automatically deletion of it. It would be nice to have the option of detaching a content template without having to lose everything. I re-run the wizard as Minesh suggested and the next thing I knew is that my content template was gone and nowhere to be found.
This ticket is now closed. If you're a WPML client and need related help, please open a new support ticket.