v3.0.0 doesn't work for me. It appears to successfully connect to luckpool.org, receive a difficulty value from the server, and then says "Miner died, restarting"; repeat, ad nauseum. This is a Win7 x64 SP1 machine with (2) GTX 1060 3GB cards. DSTM 0.5.6 and 0.5.7 work fine (indeed, 0.5.7 is running now) on the same pool with the same credentials.
At this point I am done screwing around with this train wreck, as I am philosophically opposed to paying for the "privilege" of being a beta tester.
What is your MoBo and CPU? I have the same problem. Two identical rigs on the old 775 socket. But first rig with quad-core CPU core2quad Q8400 (bminer works excellent, about week uptime without errors). The second rig with the same mobo, same GPU's and dual-core CPU core2duo E6750 says "Miner died, restarting" too. On the same time DSTM 0.5.6 and 0.5.7 work fine on this E6750 rig.