1. Standard Method

To update a theme just follow these steps:

– Download the latest theme version from your account and unzip
– In your Dashboard->Appearance->Themes activate a default theme (Twenty Seventeen or similar)
– Delete the current theme version
– Click on Add New -> Upload Theme and upload the latest theme installation zip
– Activate the theme

2. Plugin Method (Easier)

– Download the latest theme version from your account and unzip
– In your Dashboard->Plugins install “Easy Theme and Plugin Upgrades” plugin.
– Go to Dashboard->Appearance->Themes->Add New->Upload theme and upload the latest theme installation zip
– Activate the theme

It is recommended to backup a site before doing theme or plugin updates.