Hi Daniel,
Please try this:
1. Take the backup of the files start.html and offlinestart.html from the location: C:\Program Files (x86)\SAP BusinessObjects\SAP BusinessObjects Enterprise XI 4.0\win32_x86\Start Page\en
2. Rename the original file start.html to start_old.html and rename the original file offlinestart.html to start.html (This will prevent Crystal Reports to connect to the internet)
3. Launch Crystal Reports designer.
Thanks,
Nilesh