Your download link is crap! It's missing libpthread-2.dll in the zip file that you link to! A release should have the EXE file, an ALL the needed DLL files (not just some of the needed DLL files).
We are sorry for all of the mistakes. A lot of these mistakes will be resolved very soon. Right now, we have a lot of things that we are doing and dealing with. When we get everything straightened out, it will be a lot better for us, and for all of the users of Powder Sim. Thank you for your patience.