why re-install and re-pair removed in SoftwareAG8SP2

Hi All,

why re-install and repair option is removed in Advanced Options of the SoftwareAGSP1 installer a SoftwareAGSP2 installer

please any one tell me how to re-pair or re-install the environment, am working on webmethods 8SP1 in one environment and webmethods 8SP1 in another environment

Regards,
Anil Kumar ellendula