Do you support older versions of WooCommerce and WordPress?
We try to support the newest version of WooCommerce before it is even live because we test our plugins with beta releases and make sure they work.
We also test our plugins with 1 or 2 previous versions of WooCommerce and often support it. On every plugin's page and docs, you will find plugin compatibility info. Make sure to check it if you use an older version of WooCommerce. It's recommended to use the latest versions of WordPress and WooCommerce mainly for security reasons and provided the theme and plugins support them. Of course, it's also suggested to make a backup the site before updating the software.