You can inform CIS of your address change by completing a Form AR-11, addressed to CIS Attn: AR-11 Change of Address 1344 Pleasant Drive, Harrison burg, VA 22801-3852. It appears that your green card class of admission was IR-6 and if so, your divorce should not impact your green card status. But you also stated that you moved to Europe. If so, please note that if you have been physically outside the US for continuous 365 days period, and regardless of the 2020 expiration date, you may have lost your status as a green card holder. You need to consult with an immigration attorney before making plans to return Stateside.
Answered on Jan 07th, 2013 at 12:49 PM