Hey there! version 2_8 got flagged as a Trojan by Windows Defender! 2_7 is fine though. I'm a big fan of this game :)
Yeah, I had that trouble as well after a Windows update. It would actually delete the executable about a minute after I compiled it in Visual Studio! Very annoying. Eventually it seemed to stop happening here. Not sure what they were seeing; it is a fairly simple program written with Microsoft's Visual C++ that doesn't do file or network I/O. I have uploaded a version 9 that is recompiled with the latest version of the compiler. Hopefully that allays Windows' suspicions.