We have been testing with Salesforce connector v12. In you connector log you will be able to find the URL ( something like https://test.salesforce.com/services/Soap/u/**.* )
**.* represents your API version.
The Provider in the connection string has now been changed to "QvSalesforceConnector.exe" which was previously "SalesforceDLL.dll"
Please note the current version software version (12.0) is not backwards compatible with salesforce connector version 11 code. The latest we have heard from Qliktech is that they will be releasing a patch.