How to update X-Theme after it crashed my site

Hi all, I’ve been using X-Theme for my personal Wordpress website for 5+ years and never had a problem. But after the most recent July 2023 update, it completely crashed my site with a critical error. GoDaddy customer service was able to switch me to a free theme on the backend so I could get back into the admin. How do I now re-install the X-theme in its most updated version so it can still work on my site? Or do I have to give up and use a different theme altogether? I’m far from a tech expert so please feel free to go into detail about what I need to do here. Thanks in advance.

If you’re not looking for paid support/service, you should contact the item author for free support.