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Hi there. I can’t figure out how to revert back to the ORIGINAL Epson version FA20I4 firmware. I ran the Epson software updater but it doesn’t trigger an update. Do I need to use WIC to rollback to an older version first ? And do I really need to purchase another key to do this ? i installed the chipless update using your EPFWUPD utility and License.exe - not WIC. I really need to do this soon because I have to ship back the printer to Epson for an exchange !