If you plan to use QR code payment, we recommend not updating r_k GuestScreen:
Export the database
Delete the old version
Install the new version
Import the database. QR codes are supported starting from version 1.0.0.97 and higher.
If you want to update Guest Screen, you must do so through the installer. To do this:
If you had version 0.0.0.x installed, be sure to unbind the license and delete the gs.db database file. It is located in the root installation folder with GuestScreen.exe