You can change the server which a VIPRE agent talks to without removal/reinstall!!!
1. Browse to C:\ProgramData\GFI Software\AntiMalware, C:\ProgramData\Sunbelt\AntiMalware, C:\Documents and Settings\All Users\Application Data\GFI Software\Antimalware, or C:\Documents and Settings\All Users\Application Data\Sunbelt\Antimalware, depending on version of VIPRE.
2. Delete Policy.xml and Agentsettings.xml
3. Using this registry entry key:
x32:
HKLM\SOFTWARE\SBAMSvc\PolicyServiceMachineName
x64:
HKLM\SOFTWARE\Wow6432Node\SBAMSvc\PolicyServiceMachineName
change the string in PolicyServiceMachineName to the IP or working DNS name of your VIPRE server, then restart service SBAMSvc, and you are in! It will automatically drop the object into default policy of the replacement server.