When a new version of the printer driver is available, and the redistribution needs to be upgraded, in most cases it is enough just to overwrite the old redistribution files with the new ones.
Upgrading from 11.xx or before to 12.xx or higher is a special case. In this case only updating the driver files is not enough, because the path of the registry values in the MSI project and in the install/uninstall dll was changed:
The name of the Manufacturer was changed from Black Ice Software Inc to Black Ice Software LLC. If, for example the MSI project is old, and during the upgrade only the files were updated the install and uninstall won’t find the registry values. These registry values are needed for installing/uninstalling the printer drivers.
Note: It is recommended to check the version history before version upgrades. If the version history indicates that the install or install settings have been changed, please check the latest install samples, whether the changes are affecting your project.