I found this suggestion :-
Install this: Advanced Uninstaller PRO - CNET Download.com :-
Then follow these steps:
1) Use the "start installation monitor" option of the tool
2) Reinstall privitize VPN
3) Uninstall using the "uninstall monitored application"
This should completely remove everything the software has kept in your system
Then Change default search engine in Chrome and your homepage to what you want it to be.