The option to create an Outline font was removed when 1.4.0 was introduced.
An outline font style as seen in the image below can be achieved by adjusting the material properties where you set the face color to be transparent and then add an outline.
Let me know if that works for your needs?
Yes. Although the shaders have been moved outside of the Resources folder, when importing the updated TMP Essential Resources, the new shaders will be imported into their new location while the existing shaders kept in the previous location.
To resolve this, you could (1) move the new shaders with the existing shaders in the Resources folder and then move that Shaders folder back where the new shader it or (2) move the existing shaders with the new shaders or (3) delete the whole “TextMesh Pro” folder and then re-import the TMP Essential Resources and TMP Examples & Extras. That is provided you didn’t save resources / assets inside the current “TextMesh Pro” folder.
After moving the shaders, if you still get an error, you can select re-import on that folder or on the TMPro_Properties.cginc.