visit the link to have more details along with pics.
Below are the steps
1. Login into the VCE Vision appliance using putty session.
2. Run the command #StopFMagent (It stops the library services)
3. Run the command# configTool.sh
4. It will ask you to enter the path of vBlock configuration file which would be like “/opt/vce/fm/conf/vblock.xml” Path is almost same for all vBLock models.
5. Press ‘0’ to continue to next configuration of next component.
6. Press ‘v’ to validate the current configuration of current displayed component.
At the final step it wil automatically validate all it configured component.
http://vmwarediary.com/Tips/2017/8/5799800/Reconfiguring-the-VCE-Vision-vBlock-details