Question about plug-in back-up / restore

I’m currently using a 2.2.10 version of WooCommerce and I want to upgrade to 2.3.0 but it includes a warning that it’s a major update and needs to back-up files before upgrading.

I don’t have the necessary tools/programs to make a back-up, so what I thought of is to download the woocommerce folder in the plugins folder in my cPanel. And when something goes wrong after upgrading, I’m just gonna replace the woocommerce folder with the one I downloaded.

Is something wrong here?
Any insight would be appreciated!

EDIT:
The purpose of this is that I’m having problems with the product catalog on my site. Some products shows a red block instead of the product image.

If this has a fix, I can disregard the upgrade.
Thanks.