Anyone had any luck getting v19.0.0.185 upgrade to uninstall previous versions of Flash? I copied the packages supplied by Adobe/Patch Manager and changed Package Boot Helper to run an MSI uninstall first using the product codes for 18.0.0.232, but those packages don't seem to be executing the commands. It installs the new version, leaves the old version installed and doesn't even create an MSI log file. It's like it just ignores Package Boot Helper. I use the exact same setup to uninstall previous versions of JRE when I push out updates of that and those execute perfectly.
Also tried fixing the .MSI files using Orca but then Patch Manager wouldn't import the files because the checksums didn't match what it was using. Really getting annoyed with Adobe and Oracle for leaving old versions installed the past few releases.