Yes, you could use the Envato Market Plugin or you could follow the steps below.
1. Go to Appearance -> Themes
2. Active another theme & delete the bluishost theme
3. Click Add New -> Upload Theme
4. Upload, install & activate the latest version of bluishost theme
Or check out the article https://www.wpbeginner.com/wp-themes/how-to-update-a-wordpress-theme-without-losing-customization/
Best Regards,
ThemeLooks Support Team
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