Hello When you are going to update classiera Version from 1.7 to 1.8 then you must need to do these steps.
1- Login via FTP or Hosting cpanel
2- Come to root/wp-content/plugins/ Here you will see "joinwebs-locations" Delete this folder.
3- Then Replace Theme file in root/wp-content/themes/ Here you will see folder "classiera" replace this folder with latest file.
4- Now come to WordPress Dashboard, Here you will not see Theme Options, Now you need to Install required plugins.
5- You must need to install these plugins.
a) Redux Framework
b) Classiera Locations
c) Classiera Helper
6- After to install these plugins , please active these plugins and your theme options will be shown and everything will work fine.
Note: If you have done any customization in main file then please also read this article.
https://joinwebs.ticksy.com/article/6467/