Sorry to dig up an old topic but I had the same problem and I just found the solution. The solution comes from this video: https://www.youtube.com/watch?v=XehIA9JDN-c&ab_channel=TDIMod%C3%A9lisation. It is therefore necessary to:
- Save the template as a .sldlpf file, but have the sketch highlighted, otherwise the created template is empty. If the template is empty, just make edit, cancel simplified piece. The sketch therefore returns;
- Then, right-click on the sketch and select add to library. You will see a small L logo on the sketch.
I hope this helps you as much as I do in creating profiles!