If you want to disable the Auto Update function set the following Registry Value HKCU\Software\PDFCreator\Program,UpdateInterval to 0
WIth version 1.5.0, I use multiple command line switches as documented here, like this:
PDFCreator-1.5.0_setup.exe /SP- /SILENT /NOCANCEL /NORESTART /LOADINF="install.inf" /ForceInstall
The /ForceInstall parameter is to force the installation, so it won't stop and prompt the user whether to uninstall old versions.
Through trial and error, I discovered that /ForceInstall will not work if it is the first parameter on the command line. I didn't test all positions, but it works as expected as the last parameter.
PDFCreator-1_2_3_setup.exe /verysilent /f /norestart
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