Hello
Please follow the below steps to update your Application.
First of all, keep a backup of your current website.
1. Move uploads directory and .env file to a seperate place and Delete all of the contents from the root directory.
2. Download latest update application from CodeCanyon and extract it to your root directory, delete uploads directory and .env file
3. Copy uploads directory and .env file which you moved in step 1 to your current directory
That’s it. your website should be updated now and running fine. Make sure your server is ready to run Laravel 6
Best Regards