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

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
Rec supports version 2.0.12 and back. Please do not download 2.1 or higher as it may interfere with the performance of the receipt printers.
Open the downloaded file and click Next
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Click Install

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.