Updated Clients
https://sourceforge.net/projects/philosopherstone/files/DTC/Datacoin-Qt_HP_Intel.zip - For newer Intel Line (i3i5i7)
Datacoin-Qt_HP_Bulldozer.zip For AMD bulldozer, Piledriver,Steamroller.
Datacoin-Qt_HP_Core2.zip - Legacy CPU or if the other ones crash on you.
If you want to make sure it's working, try out testnet=1 in your .conf file if you would like to test block generation between clients. Solo mining is very difficult now but these can be usable until you switch to pools.
Edit Clarity