For unknown reasons "Save All" doesn't save the vsprops files.
diff --git a/PCbuild9/pyd.vsprops b/PCbuild9/pyd.vsprops
index 7600ee6..2a69d95 100644
--- a/PCbuild9/pyd.vsprops
+++ b/PCbuild9/pyd.vsprops
@@ -7,7 +7,7 @@
 	>
 	<Tool
 		Name="VCCLCompilerTool"
-		PreprocessorDefinitions="NDEBUG;_USRDLL"
+		PreprocessorDefinitions="NDEBUG"
 		RuntimeLibrary="2"
 	/>
 	<Tool