Hello Lars,
Thank you so much for your theme purchase and thanks for your question regarding our theme. We really feel happy to help our clients. As per your question, free theme can’t automatically update to pro version, you have to add it manually.
Go to Appearance > Themes > Add New > Upload(Upload the Zip file of the theme ‘acmeblogpro.zip’) and activate it.
Of you can upload if through FTP(wp-contents/themes/upload the folder ‘acmeblogpro’ not zip file).

If you have any question, don’t hesitate to ask. Our dedicated support forum will answer you.

Kind Regards,
Acme Supports

Hello william,

We are very happy to know that you are using child theme for theme customization. You are doing absolutely right way.
It seems like you have already started to customize. You have added this code.

.site-logo.float-left {
    width: 100%;
}

which is good.
Now you have to change the logo( image ) size. Currently your logo size is 290 * 60, please increase logo size.
Further if you are willing to change file for the header, the file is not core.php, it is header.php inside acmethemes/hooks/header.php of theme folder supermagpro. You can just copy paste file in the child theme in the same path eg. in child theme create acmethemes folder then inside there create hooks folder then paste header.php of parent theme there, now you are good to go for customization. Same goes on other files too.
If you have further query please feel free to ask.

Best Regards,
Acme Themes

Hello Kalise10,
Thank you so much for your question. We have a options to hide related post on the single post.
Appearance > Customize > Single Post Options > Show/Hide Related Post.

SuperMag

Thanks

Hello mathilde,
Thank you so much for using our theme. You want to remove the Author only from home page or from every place of the site. Would you please elaborate it, so that we can suggest you the best idea.

Thanks

Hello Amandeep,
We checked your site and it is working fine here. Would you please refresh your site once with hard refresh or please check it with another browser ?

Thanks

Hello,
Please add the below css codes on Custom CSS field.

article.post .entry-footer {
    clear: both;
    display: none;
}

article.post .entry-header .entry-meta {
    display: none;
}

If not worked again, please let us know. We will help you with other alternatives methods too.

Thanks

Hello ChicagoMusicGuide,
Thanks for your questions. You will get all the options related to related post are under Appearance > Customize > Single Post Options > Related Post options. You will get the options there. If you want to add more features there, you need to customize the theme. You will get all the codes inside acmethemes/hooks/related-post.php file. Please customize the theme as your need. https://doc.acmethemes.com/supermagpro/#Howtoshowrelatedpostonsinglepost?

Note: Child theme is recommend to customize theme.

Warm Regards,
Acme Themes