Aquí está la información que buscas, está en inglés, espero que te sirva.
Si tienes cualquier problema me dices y te guio, tengo bastante experiencia con este activex de crystal.
Un saludo,
ALEJANDRO.
http://technicalsupport.businessobje...1%200%20356275
To remove a corrupted, unrecognizable, or older version of the ActiveX Viewer:
1. Right-click the Internet Explorer icon, and click 'Properties'.
2. Click the 'Settings' button.
3. Click the 'View Objects' button, right-click 'Crystal Report Viewer Control', and then click 'Remove'.
4. Click 'Yes' when prompted to remove the control.
5. Close the 'Downloaded Program Files' dialog box, click 'OK' on the 'Settings' dialog box, and then click 'OK' on the 'Internet Options' dialog box.
6. Search the computer for the following files and manually deregister them:
• CRViewer.dll
• SwebRS.dll
• SViewHLP.dll
• ReportParameterDialog.dll
• CSelexpt.ocx
• XQViewer.dll