Rick,
You should be able to just install Kiwi Web-access. I would first remove it completly using the "Add Remove Programs" option in windows. Then look in your installation folder for Kiwi Syslog Server. There should be a subfolder \Setup and in that folder is a file called: KiwiSyslogWebAccess_1.4.4_Setup.exe
That file should allow you to install just the KiwiSyslogWebAccess.
If that doesn't work, re-installing Kiwi is not harmfull, and will give you the option to install the Kiwi Syslog Web Access. I would Export my configuration, and backup my scripts directory just to be on the safe side, but I've re-installed it a few times and it's been painless.