Updating the Directory Press Theme

I have a very much customized website https://www.informedsenior.ca and I updated the wordpress core files and now when I want to add a listing I am unable to add the Listings Options – the custom fields just don’t show up. I tried to open the screen option and it’s not working. I can’t insert and image. PLEASE HELP! I need this to be fixed. How can I update the theme ( I guess that’s the problem) while not loosing all the customization. I can NOT loose the customization. I worked weeks to customize this for a client.