It’s not clear in WP how to deactivate old version of theme and update current/new version 1.8.
Can you please explain exactly how?
We are using a Child theme that is connected to the Attitude Pro theme, and it is backed up.
First activate a different theme and delete the old version of the theme then upload the new version of the theme and activate it. If you have not customize the code then we are sure that you will not lost any data/setting lost but if you customize the code then your all customize code will be lost. So, first back up your previous version of the theme and then only activate the new one if you have customize the code.
.
.