In order to update the QZ Tray for your Receipt Printer, you will have to uninstall your current version and upload the new version directly from the QZ Tray site.
Instructions
On your computer, search for and select the Control Panel

Select Uninstall a Program

Select the QZ Tray option

Right-click and select Uninstall

Click Uninstall on the pop-up screen

Click Close to exit the install window

Navigate to the QZ Site
Select V2.2.4 or an older version and download the .EXE file

Note
Our platform officially supports versions up to 2.2.5 of the QZ Tray App. While you may choose to use versions above 2.2.5, please note that they are not officially supported and may not be fully compatible. Proceed with newer versions at your discretion.
Open the downloaded file and click the Next Button
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Click the Install button

Click Close once the installation is complete
Note
If your printer does not work after your installation, restart your printer. If that does not work, restart your computer.