You may get a warning from Windows when installing about "Unknown Publisher" or "Windows Protected your pc". Click "Run anyway" or "More info" to continue the install.
If you are re-installing Ol Monitor, your previous settings will be loaded. Even after using the uninstaller to remove OL Monitor, settings will remain on the PC unless you wipe settings.
Can't find your old settings after installing a new version of Ol Monitor? Cycle through the settings locations using the "Reload with" option.