in your list i see the following extension which is not compatible with DW CS6:
WebAssist.com PayPal eCommerce Toolkit Recipes Aktiviert WebAssist.com 1.0.0
you also list version 5.0.6 for eCart, and 1.1.2 for Data Bridge, the most recent versions are 5.0.7 and 1.1.3
uninstall the WebAssist.com PayPal eCommerce Toolkit Recipes extension, and the eCart and Data Bridge extensions, then install the latest versions of eCart and Data Bridge.
make sure to delete the cache file from the configuration folder.