How can install the new version without losing my content?

You can do this using following plugins.

https://wordpress.org/plugins/easy-theme-and-plugin-upgrades/

I’m having another issue on the home page where the 2nd row “Recently Added” is not aligning properly. see attached

To resolve this issue try using following custom CSS code as described above.

.sh-woocommerce-products .woocommerce ul.products li.first {
    clear: both!important;
}