CABI 4.1 does not support upgrade from CABI 3.x. Migration is supported using PostInstall utility that is shipped with CABI 4.1 SP3 VCD.
I have seen problem with Business Objects Integration with Spectrum 10 when uninstalling CABI 3.x and installing CABI 4.1 SP3. The CABI 3.x uninstall did not clean up the installation completely.
Install in a spare machine in case you have one.
After installing and verifying the CABI, you must Deploy Spectrum Content, Configure Database Driver and Customize CABI Setup for Spectrum. Follow the steps bellow:
Post Installation Configuration for CABI