Upgradng/Installing the 11.1.x Management Console on a 11.0.x Client machine can cause client failures. This can include communication failure and being unable to decrypt the machine.
To avoid this situation a specific upgrade process will need to be used.
Do not install the 11.1.x Management Console on a 11.0.x Client Machine. Make sure that the client has been upgraded to 11.1.x prior to installing the 11.1.x Management Console.
Upgrade Process:
1. Uninstall the 11.0.x Management Console
2. Upgrade the 11.0.x Client to 11.1.x
3. Install the 11.1.x Management Console