An unattended uninstall of Xbench

Is there a method for doing an unattended uninstall of Xbench 3.0, Build 1410 64Bit? Currently, running C:\Program Files\ApSIC\Xbench\uninst.Xbench.exe shows 2 prompts – the first to confirm you want to remove Xbench, and the 2nd after the uninstall is completed. Is there a switch to prevent these dialogs from appearing?

Xbench uses the NSIS installer, and in theory the /S or /SD switch should do it.

However, apparently it does not work with the latest installer. We’ve created a task in our DB to fix it in a future update.