Hello,

You should have the theme already been installed and activated. So navigate to Appearance > Install plugins and try to update plugins if the option is available. (It should be)

If you cannot update automatically, navigate to plugins and upload the plugin as described above, you download theme folder to your PC and then upload plugin from there.

One more way to upload is via FTP https://xtemos.com/docs/woodmart/installation-process/

Best Regards