dorothai on "[Plugin: WooCommerce - excelling eCommerce] POSSIBLE TO DOWNGRADE TO VERSION 1.6 ???"

Not true that all works like charm if it is bought at woocommerce - the last update knocked attributes out - if woo-themes or not.
And uninstalling a plugin to re-install it so they can upgrade the plugin automatically (You do not loose any data!!! in the mail) - lost a 690 row database table of manual inserted FedEx, EMS and Registered Mail data.
So whenever - always test first or make at least a MySql db backup.
They are marketing their stuff - that is clear and won't say hey we make big boos too - we are just human! that can trash your web site.
Install Apache / PHP and MySql (same versions you have on the server) on your machine and test any upgrades first here.