as a result of compatibility issues with DW CC 2014.1, we are having to completely redo the activation scheme.
eCart 6.1.0, MySQLi 1.0.3 and Data Bridge 1.2.1 use a newer activation scheme, and I think this is causing a conflict with Design Extender 1.1.9 and Free Tools 1.1.1
Those 2 extension will be updated in the next couple of days.
I would uninstall all extensions, then install only eCart, Data Bridge and ySQLi, when the updates for Design Extender and Free tools are released, you can install those.