diff -urN a/FreeFileSync/Source/base/ffs_paths.cpp b/FreeFileSync/Source/base/ffs_paths.cpp
--- a/FreeFileSync/Source/base/ffs_paths.cpp	2018-11-12 17:59:54.000000000 +0100
+++ b/FreeFileSync/Source/base/ffs_paths.cpp	2019-01-05 16:59:32.778875776 +0100
@@ -66,7 +66,7 @@
     ZEN_ON_SCOPE_EXIT(wxTheApp->SetAppName(appName));
 
     //if (isPortableVersion())
-    return appendSeparator(getExeFolderParentPath());
+    return appendSeparator(getExeFolderParentPath() + "/share/FreeFileSync");
     //else //use OS' standard paths
     //    return appendSeparator(utfTo<Zstring>(wxStandardPathsBase::Get().GetResourcesDir()));
 }
diff -urN a/zen/ring_buffer.h b/zen/ring_buffer.h
--- a/zen/ring_buffer.h	2018-11-12 17:59:54.000000000 +0100
+++ b/zen/ring_buffer.h	2019-01-05 16:32:52.042879570 +0100
@@ -8,6 +8,7 @@
 #define RING_BUFFER_H_01238467085684139453534
 
 #include <cassert>
+#include <cstddef>
 #include "scope_guard.h"
 
 
diff -urN a/zen/serialize.h b/zen/serialize.h
--- a/zen/serialize.h	2018-11-12 17:59:54.000000000 +0100
+++ b/zen/serialize.h	2019-01-05 16:32:59.146879553 +0100
@@ -9,6 +9,7 @@
 
 #include <functional>
 #include <cstdint>
+#include <cstddef>
 #include "string_base.h"
 //keep header clean from specific stream implementations! (e.g.file_io.h)! used by abstract.h!