A bluescreen crash with BCCODE: 19 (0x19) is almost always caused by a device driver or filter. I did a search for the software and didn't see it listed by a trusted site, so I tried three different download sites, all were either blocked by my security or down. Not a good sign at all.
I was hoping to checkout what the software was supposed to do, I won't bother now - my guess is that the software contained a driver or filter set to run at boot time that would enable the software deeper access or better control over some hardware, probably into the networking stack, and interfered with your network connection and firewall.
Crashes like that can be very time-consuming to diagnose and fix, I'm pleased your cleanup routine got you back online so quickly, nice work!