3DConnextion where can I find the older driver [10.6.1]

Hi All
I was trusting foolishly, and installed the latest 3DWare from their website Archive that is listed for my device [space navigator for notebook] that is 10.6.5
and now it doesn’t recognise my device!

I tried to uninstall and put back the older one I had [10.6.1] but I get a massage that it is blocked and I have to allow in Security pref. But in Security pref. that option is not available.
I think because it has a part that is hidden [the firmware] and that part I don’t know how to restore from Time Machine…?

thanks a lot