I installed the trial version. It installs, fine but sees no scanner. I tried the USB and then the firewire but SF still doesn't find any scanner. Now I've noticed that there is no way to uninstall it. This is a sign of truly poor programming! I guess they are too cheap to write a script and use an installer with the uninstall option. It figures. I'm going back to VueScan which works or at least it did until I installed this software.