How to delete a legacy extension from Epson?

There is an app called Find Any File that can be configured to run and look in all directories, including ones that Spotlight does not search, and find all files that have the string 'epson" embedded in their name. You can also have it find any file with "epson"embedded in its contents. You can then inspect what it find and delete them if you are certain they are not needed for anything else. Be sure to run it with administrator privileges. I used it for something like this to remove all traces of Western Digital drive utility software that someone had installed on their Mac and wanted completely removed. I searched for everything that contained "western," "digital," and "WD." Many false hits but those were easy to bypass.

Open library/extensions and see if any relates to your printer. If so then drag to trash.

You can get it in the App Store, or you can download it off the internet as shareware.

[I find it useful (it can search in hidden directories and files even) so I paid the shareware fee (which was a few dollars) as I feel it is important to support people who create useful tools like this.]