This knowledge articles provides information on updating the touch firmware in my 4243L monitor
The touch firmware for the 4243L monitors with IntelliTouch technology is not field upgradeable. These products require the use of a proprietary jig to perform the update as well as special software. Updating touch FW on IntelliTouch units is extremely rare and highly unlikely to correct any kind of touch issues you may be experiencing. To have the FW updated on IntelliTouch units you would need to create an RMA and send the unit to Elo to be updated.
Please report any broken links by emailing support@elotouch.com and include a link to the knowledge article