You are using child theme that’s why you see 1.0 version. To check the parent theme version go to Appearance > Themes > Item details.
What version of WooCommerce do you use? If you updated WC to version 3.1 then you need to wait next theme upate. Because version 3.16.1 has some out of date files for the WC 3.1. In case you use WC 3.0.9 then you need to update XStore to version 3.16.1.