Hi Sriram,
You can uninstall the addons by going to SAINT transaction - Click on Deinstallable Components - choose the addon you want to uninstall. Refer to below note:
2011192 - Uninstalling ABAP add-ons
If you dont see the addon there which you prefer to uninstall it, then remove the entries from following tables:
AVERS
AVERS_EXT
CVERS
CVERS_REF
CVERS_LAN
CVERS_LAN
PAT03
Hope this helps,
JC