Make sure the compiled EXE has execute permissions.

.gitignore

@@ -1,6 +1,7 @@
 log4net.xml
 out/
 _work_/
+_releases_/
 
 .vscode/
 *.swp

make_release.py

@@ -2,6 +2,7 @@
 
 import sys
 import os
+import stat
 import subprocess
 import zipfile
 import getopt
@@ -41,6 +42,9 @@ with zipfile.ZipFile( output_fname, "w" ) as zip_file:
     # add the binaries
     os.chdir( "out" )
     for fname in os.listdir( "." ):
+        if os.path.splitext( fname )[1] == ".exe":
+            flags = os.stat( fname ).st_mode
+            os.chmod( fname, flags | stat.S_IEXEC )
         zip_file.write( fname )
     os.chdir( ".." )
     # add the license