Is there someone who already has some experience with the salesforce connector V12.
There is a field URL in the connector, which you should use if you dont want to go to the production environment of Salesforce i.e. to go to the sandbox. (in previous versions you had to check the sandbox checkbox.)
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.