Your previous & current purchase code is not the same. Just check.
However, for search bar appearance, please check your server PHP version. It should be a minimum of 7.4.
Then try to make a fresh installation.
If not work, please give us your website URL and temporary admin access with FTP access.
For the Background color, you should go Appearance => Trade options => Styling.
Here is a screenshot – https://prnt.sc/1qbe8rx