I found a solution:

1. search all files containing *salesforce* with Explorer Search and delete them
2. run the Business Contact Manager setup.exe ( x16-56890.exe ) and cancel the installation after extracting the files while installing Sales Outlook Edition 3
3. run setup.exe in C:\User\"Username"\AppData\Local\Temp\BcmSetup.de-DE ( maybe BcmSetup.en-EN )
4. Installation succeeds without any problems