diff --git a/HashSave.cpp b/HashSave.cpp
index 608fadb..072458d 100644
--- a/HashSave.cpp
+++ b/HashSave.cpp
@@ -186,6 +186,8 @@ VOID __fastcall HashSaveWorkerMain( PHASHSAVECONTEXT phsctx )
     dwStarted = GetTickCount();
 #endif
 
+    class CanceledException {};
+
     // concurrency::parallel_for_each(vecpItems.cbegin(), vecpItems.cend(), ...
     auto per_file_worker = [&](PHASHSAVEITEM pItem)
 	{
@@ -201,7 +203,7 @@ VOID __fastcall HashSaveWorkerMain( PHASHSAVECONTEXT phsctx )
             // Allocate a read buffer (one buffer is cached per worker thread by Alloc/Free)
             pbBuffer = (PBYTE)concurrency::Alloc(READ_BUFFER_SIZE);
             if (pbBuffer == NULL)
-                return;
+                throw CanceledException();
         }
 #endif
 
@@ -229,7 +231,7 @@ VOID __fastcall HashSaveWorkerMain( PHASHSAVECONTEXT phsctx )
         if (phsctx->status == PAUSED)
             WaitForSingleObject(phsctx->hUnpauseEvent, INFINITE);
 		if (phsctx->status == CANCEL_REQUESTED)
-			return;
+            throw CanceledException();
 
 		// Write the data
 		HashCalcWriteResult(phsctx, pItem);
@@ -240,12 +242,16 @@ VOID __fastcall HashSaveWorkerMain( PHASHSAVECONTEXT phsctx )
     };
 #pragma warning(pop)
 
+    try
+    {
 #ifdef USE_PPL
-    if (bMultithreaded)
-        concurrency::parallel_for_each(vecpItems.cbegin(), vecpItems.cend(), per_file_worker);
-    else
+        if (bMultithreaded)
+            concurrency::parallel_for_each(vecpItems.cbegin(), vecpItems.cend(), per_file_worker);
+        else
 #endif
-        std::for_each(vecpItems.cbegin(), vecpItems.cend(), per_file_worker);
+            std::for_each(vecpItems.cbegin(), vecpItems.cend(), per_file_worker);
+    }
+    catch (CanceledException) {}  // ignore cancellation requests
 
 #ifdef _TIMED
     if (phsctx->cTotal > 1 && phsctx->status != CANCEL_REQUESTED)
diff --git a/HashVerify.cpp b/HashVerify.cpp
index 56ef2fa..88dc3e7 100644
--- a/HashVerify.cpp
+++ b/HashVerify.cpp
@@ -533,6 +533,8 @@ VOID __fastcall HashVerifyWorkerMain( PHASHVERIFYCONTEXT phvctx )
 	// sound notification of completion when appropriate
 	phvctx->dwStarted = GetTickCount();
 
+    class CanceledException {};
+
     // concurrency::parallel_for_each(phvctx->index, phvctx->index + phvctx->cTotal, ...
     auto per_file_worker = [&](PHASHVERIFYITEM pItem)
 	{
@@ -543,7 +545,7 @@ VOID __fastcall HashVerifyWorkerMain( PHASHVERIFYCONTEXT phvctx )
             // Allocate a read buffer (one buffer is cached per worker thread by Alloc/Free)
             pbBuffer = (PBYTE)concurrency::Alloc(READ_BUFFER_SIZE);
             if (pbBuffer == NULL)
-                return;
+                throw CanceledException();
         }
         else
 #endif
@@ -594,7 +596,7 @@ VOID __fastcall HashVerifyWorkerMain( PHASHVERIFYCONTEXT phvctx )
         if (phvctx->status == PAUSED)
             WaitForSingleObject(phvctx->hUnpauseEvent, INFINITE);
 		if (phvctx->status == CANCEL_REQUESTED)
-			return;
+            throw CanceledException();
 
 		// Part 3: Do something with the results
 		if (whres.dwFlags)
@@ -643,18 +645,21 @@ VOID __fastcall HashVerifyWorkerMain( PHASHVERIFYCONTEXT phvctx )
 		PostMessage(phvctx->hWnd, HM_WORKERTHREAD_UPDATE, (WPARAM)phvctx, (LPARAM)pItem);
     };
 
+    try
+    {
 #ifdef USE_PPL
+        if (bMultithreaded)
+            concurrency::parallel_for_each(phvctx->index, phvctx->index + phvctx->cTotal, per_file_worker);
+        else
+#endif
+            std::for_each(phvctx->index, phvctx->index + phvctx->cTotal, per_file_worker);
+    }
+    catch (CanceledException) {}  // ignore cancellation requests
+
     if (bMultithreaded)
-    {
-        concurrency::parallel_for_each(phvctx->index, phvctx->index + phvctx->cTotal, per_file_worker);
         DeleteCriticalSection(&updateCritSec);
-    }
     else
-#endif
-    {
-        std::for_each(phvctx->index, phvctx->index + phvctx->cTotal, per_file_worker);
         VirtualFree(pbTheBuffer, 0, MEM_RELEASE);
-    }
 
 	// Play a sound to signal the normal, successful termination of operations,
 	// but exempt operations that were nearly instantaneous
diff --git a/installer/HashCheck.nsi b/installer/HashCheck.nsi
index 22357ec..a235da4 100644
--- a/installer/HashCheck.nsi
+++ b/installer/HashCheck.nsi
@@ -6,7 +6,7 @@
 Unicode true
 
 Name "HashCheck"
-OutFile "HashCheckSetup-v2.4.0.37-beta.exe"
+OutFile "HashCheckSetup-v2.4.0.38-beta.exe"
 
 RequestExecutionLevel admin
 ManifestSupportedOS all
@@ -53,15 +53,15 @@ FunctionEnd
 !insertmacro MUI_LANGUAGE "Ukrainian"
 !insertmacro MUI_LANGUAGE "Catalan"
 
-VIProductVersion "2.4.0.37-beta"
+VIProductVersion "2.4.0.38-beta"
 VIAddVersionKey /LANG=${LANG_ENGLISH} "ProductName" "HashCheck Shell Extension"
-VIAddVersionKey /LANG=${LANG_ENGLISH} "ProductVersion" "2.4.0.37-beta"
+VIAddVersionKey /LANG=${LANG_ENGLISH} "ProductVersion" "2.4.0.38-beta"
 VIAddVersionKey /LANG=${LANG_ENGLISH} "Comments" "Installer distributed from https://github.com/gurnec/HashCheck/releases"
 VIAddVersionKey /LANG=${LANG_ENGLISH} "CompanyName" ""
 VIAddVersionKey /LANG=${LANG_ENGLISH} "LegalTrademarks" ""
 VIAddVersionKey /LANG=${LANG_ENGLISH} "LegalCopyright" "Copyright © Kai Liu, Christopher Gurnee, Tim Schlueter, et al. All rights reserved."
 VIAddVersionKey /LANG=${LANG_ENGLISH} "FileDescription" "Installer (x86/x64) from https://github.com/gurnec/HashCheck/releases"
-VIAddVersionKey /LANG=${LANG_ENGLISH} "FileVersion" "2.4.0.37-beta"
+VIAddVersionKey /LANG=${LANG_ENGLISH} "FileVersion" "2.4.0.38-beta"
 
 ; With solid compression, files that are required before the
 ; actual installation should be stored first in the data block,
diff --git a/version.h b/version.h
index a804098..f975821 100644
--- a/version.h
+++ b/version.h
@@ -12,10 +12,10 @@
 #define HASHCHECK_NAME_STR "HashCheck Shell Extension"
 
 // Full version: MUST be in the form of major,minor,revision,build
-#define HASHCHECK_VERSION_FULL 2,4,0,37
+#define HASHCHECK_VERSION_FULL 2,4,0,38
 
 // String version: May be any suitable string
-#define HASHCHECK_VERSION_STR "2.4.0.37-beta"
+#define HASHCHECK_VERSION_STR "2.4.0.38-beta"
 
 #ifdef _USRDLL
 // PE version: MUST be in the form of major.minor