Why does SAP Dashboards crash when I try to use the add-on manager?

SAP Dashboards and Xcelsius require UAC to be disabled on your computer, in order to install add-ons. Otherwise it can potentially crash Xcelsius. In newer versions of SAP Dashboards the add-on manager is grayed out and disabled until you disable UAC.

Instructions to disable UAC on Vista and Windows 7 are here: