Inserting license code issue.
Having got an installation error updating AIS 5.0.677 to 5.1.864, I uninstalled, ran Registry Mechanic, installed 5.1.874.
When prompted during installation I inserted the license code but when it finished, all shields were deactivated and license "expired" displayed, despite the expiry date showing as 13/8/2011. Inserting the same code a second time fixed it.