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.

Make sure to try out testnet=1 in your .conf file if you would like to compare block generation between clients, and test them out.  Solo mining is very difficult now but these can be usable until you switch to pools.