Auto reconnect isn't yet a feature of DashCommand. The post in our forum wasn't a bug report, but a feature request. DashCommand does auto connect, but only once when it is first opened. It doesn't re-connect if the connection is lost yet.
How is your computer crashing? Does it bluescreen, or do nothing at all, or what? I had a driver problem with my Sony Vaio (the FTDI drivers for the ElmScan5 had a conflict with something), but it fixed itself after I reformatted. I haven't seen a computer where it was crashed by DashCommand itself. Do you have any extra hardware plugged into your computer?