Have I renewed my digital certificate? Reference num. 2976 Views: 3835 Home / FAQ / Have I renewed my digital certificate? CHECK IF YOUR CERTIFICATE HAS BEEN RENEWED: 1 RunĀ Nexus Personal program (type down Nexus in Start menu). Open Nexus Personal by clicking on the icon in the Menu bar. 2 Click on View – Preferences – Card Readers – Empty Cache. 3 A new dialog opens stating that the cache has been cleared. Confirm by clicking OK. 4 Your digital certificate has been renewed if the dialog displays Digital Signature – 2 and Non Repudiation – 2.