Problem with images

You can set the location of image 1. in the metabox at the bottom of the edit posts page and that will be selected first.

https://www.fastpic.info/image/5071eca186

already selected

Not that page. The metabox is at the bottom when you edit a post / write a new post.

https://ps.w.org/contextual-related-posts/assets/screenshot-8.png?rev=1237150

https://www.fastpic.info/image/4c0aedac9f
https://www.fastpic.info/image/0be13fee49

sry my eng so bag..
https://ps.w.org/contextual-related-posts/assets/screenshot-8.png?rev=1237150

You need to add the location of the image you want to be shown in the “location of thumbnail” textbox like how I have it in the screenshot.