Because older version of EventReporter (known as EvntSLog) had no installer, you have to follow these instructions.
How to update:
You haven’t installed the new version yet? Good!
1. Stop the (older) Eventreporter service and start the setup.
2. Choose the same Installation-directory as the old installation of EnventReporter.
3. Apply the installation.
4. Start the Eventreporter service.