This article describes where to find the EloOptions.ini file

The default location for the EloOptions.ini file is:
C:\Program Files\Elo Touch Solutions\EloOptions.ini

Refer to the screenshot below for an example:

If the EloOptions.ini file is not located in the default directory, it is possible that a different folder was selected during the driver installation process for extracting files. In this case, you will need to perform a search on your system to locate the EloOptions.ini file.