Hiding the gravity forms plugin upgrading notice

My site is avelim.co.il. The site is on Hebrew wordpress 3.3.1, using the theme Weaver 2.2.6 with many customization done by programmers. I am using Gravity Forms version 1.6.2 which was customized by programmers. I do not want to upgrade gravity forms since it will undo the customization done. Currently there are notices in four places on the dashboard regarding the plugin update. See [login to view URL] I don't want to have them and I do not want the plugin too appear on the list of updates. This might cause me to update by mistake. Freelancer should remove all the update notices for gravity forms from the dashboard, to prevent accidental upgrade. Job should be finished within 24 hours.