diff --git a/dll/dll/steam_apps.h b/dll/dll/steam_apps.h
index bdf5cdbd..e44e004a 100644
--- a/dll/dll/steam_apps.h
+++ b/dll/dll/steam_apps.h
@@ -33,6 +33,9 @@ public ISteamApps
     class Settings *settings{};
     class SteamCallResults *callback_results{};
     class SteamCallBacks *callbacks{};
+	
+	void FillProofOfPurchaseKey( AppProofOfPurchaseKeyResponse_t& data, AppId_t nAppID, bool ok_result, std::string key = "cdcdcdcdcdcdcdcdcdcdcdcdcdcdcdcd" );
+	void FillProofOfPurchaseKey( AppProofOfPurchaseKeyResponse007_t& data, AppId_t nAppID, bool ok_result, std::string key = "cdcdcdcdcdcdcdcdcdcdcdcdcdcdcdcd" );
 
 public:
     Steam_Apps(Settings *settings, class SteamCallResults *callback_results, class SteamCallBacks *callbacks);
@@ -83,6 +86,7 @@ public:
 	// You'll receive an AppProofOfPurchaseKeyResponse_t callback when
 	// the key is available (which may be immediately).
 	void RequestAppProofOfPurchaseKey( AppId_t nAppID );
+	void RequestAppProofOfPurchaseKey_OLD( AppId_t nAppID );
 
 	bool GetCurrentBetaName( char *pchName, int cchNameBufferSize ); // returns current beta branch name, 'public' is the default branch
 	bool MarkContentCorrupt( bool bMissingFilesOnly ); // signal Steam that game files seems corrupt or missing
diff --git a/dll/steam_apps.cpp b/dll/steam_apps.cpp
index 88dc3a9e..18f35965 100644
--- a/dll/steam_apps.cpp
+++ b/dll/steam_apps.cpp
@@ -18,6 +18,50 @@
 #include "dll/steam_apps.h"
 #include "sha/sha1.hpp"
 
+
+void Steam_Apps::FillProofOfPurchaseKey( AppProofOfPurchaseKeyResponse_t& data, AppId_t nAppID, bool ok_result, std::string key )
+{
+    data.m_nAppID = nAppID;
+    if (ok_result) {
+        // TODO maybe read this from a config file "purchased_keys.txt":
+        // 480=AAAAA-BBBBB-CCCCC-DDDDD
+        // 218620=XYZFJ-13370-98765
+        size_t min_len = key.size() < k_cubAppProofOfPurchaseKeyMax
+            ? key.size()
+            : k_cubAppProofOfPurchaseKeyMax - 1; // -1 because we need space for null
+        data.m_eResult = EResult::k_EResultOK;
+        data.m_cchKeyLength = static_cast<uint32>(min_len);
+        memcpy(data.m_rgchKey, key.c_str(), min_len);
+        data.m_rgchKey[min_len] = 0;
+    } else {
+        data.m_eResult = EResult::k_EResultFail;
+        data.m_cchKeyLength = 0;
+        data.m_rgchKey[0] = 0;
+        data.m_rgchKey[1] = 0;
+    }
+}
+
+void Steam_Apps::FillProofOfPurchaseKey( AppProofOfPurchaseKeyResponse007_t& data, AppId_t nAppID, bool ok_result, std::string key )
+{
+    data.m_nAppID = nAppID;
+    if (ok_result) {
+        // TODO maybe read this from a config file "purchased_keys.txt":
+        // 480=AAAAA-BBBBB-CCCCC-DDDDD
+        // 218620=XYZFJ-13370-98765
+        size_t min_len = key.size() < k_cubAppProofOfPurchaseKeyMax
+            ? key.size()
+            : k_cubAppProofOfPurchaseKeyMax - 1; // -1 because we need space for null
+        data.m_eResult = EResult::k_EResultOK;
+        memcpy(data.m_rgchKey, key.c_str(), min_len);
+        data.m_rgchKey[min_len] = 0;
+    } else {
+        data.m_eResult = EResult::k_EResultFail;
+        data.m_rgchKey[0] = 0;
+        data.m_rgchKey[1] = 0;
+    }
+}
+
+
 Steam_Apps::Steam_Apps(Settings *settings, class SteamCallResults *callback_results, class SteamCallBacks *callbacks)
 {
     this->settings = settings;
@@ -220,28 +264,6 @@ void Steam_Apps::UninstallDLC( AppId_t nAppID )
 }
 
 
-static void FillProofOfPurchaseKey( AppProofOfPurchaseKeyResponse_t& data, AppId_t nAppID, bool ok_result, std::string key = "cdcdcdcdcdcdcdcdcdcdcdcdcdcdcdcd" )
-{
-    data.m_nAppID = nAppID;
-    if (ok_result) {
-        // TODO maybe read this from a config file "purchased_keys.txt":
-        // 480=AAAAA-BBBBB-CCCCC-DDDDD
-        // 218620=XYZFJ-13370-98765
-        size_t min_len = key.size() < k_cubAppProofOfPurchaseKeyMax
-            ? key.size() < k_cubAppProofOfPurchaseKeyMax
-            : k_cubAppProofOfPurchaseKeyMax - 1; // -1 because we need space for null
-        data.m_eResult = EResult::k_EResultOK;
-        data.m_cchKeyLength = static_cast<uint32>(min_len);
-        memcpy(data.m_rgchKey, key.c_str(), min_len);
-        data.m_rgchKey[min_len] = 0;
-    } else {
-        data.m_eResult = EResult::k_EResultFail;
-        data.m_cchKeyLength = 0;
-        data.m_rgchKey[0] = 0;
-        data.m_rgchKey[1] = 0;
-    }
-}
-
 // Request legacy cd-key for yourself or owned DLC. If you are interested in this
 // data then make sure you provide us with a list of valid keys to be distributed
 // to users when they purchase the game, before the game ships.
@@ -268,6 +290,28 @@ void Steam_Apps::RequestAppProofOfPurchaseKey( AppId_t nAppID )
     callbacks->addCBResult(data.k_iCallback, &data, sizeof(data));
 }
 
+void Steam_Apps::RequestAppProofOfPurchaseKey_OLD( AppId_t nAppID )
+{
+    PRINT_DEBUG_TODO();
+    std::lock_guard<std::recursive_mutex> lock(global_mutex);
+
+    AppProofOfPurchaseKeyResponse007_t data{};
+    data.m_nAppID = nAppID;
+    
+    // check Steam_Apps::BIsAppInstalled()
+    if (nAppID == 0 || nAppID == UINT32_MAX) {
+        FillProofOfPurchaseKey(data, nAppID, false);
+    } else if (nAppID == settings->get_local_game_id().AppID() || settings->hasDLC(nAppID)) {
+        FillProofOfPurchaseKey(data, nAppID, true);
+    } else {
+        //TODO what to do here?
+        FillProofOfPurchaseKey(data, nAppID, false);
+    }
+
+    callbacks->addCBResult(data.k_iCallback, &data, sizeof(data));
+}
+
+
 // returns current beta branch name, 'public' is the default branch
 // "true if the user is on a beta branch; otherwise, false"
 // https://partner.steamgames.com/doc/api/ISteamApps
@@ -423,15 +467,15 @@ void Steam_Apps::RequestAllProofOfPurchaseKeys()
 
     // DLCs
     const auto count = settings->DLCCount();
-    for (unsigned int i = 0; i < settings->DLCCount(); i++) {
-        AppId_t app_id;
-        bool available;
-        std::string name;
-        settings->getDLC(i, app_id, available, name);
-
-        AppProofOfPurchaseKeyResponse_t data{};
-        FillProofOfPurchaseKey(data, app_id, true);
-        callbacks->addCBResult(data.k_iCallback, &data, sizeof(data));
+    for (unsigned i = 0; i < settings->DLCCount(); i++) {
+        AppId_t app_id{};
+        bool available{};
+        std::string name{};
+        if (settings->getDLC(i, app_id, available, name)) {
+            AppProofOfPurchaseKeyResponse_t data{};
+            FillProofOfPurchaseKey(data, app_id, true);
+            callbacks->addCBResult(data.k_iCallback, &data, sizeof(data));
+        }
     }
     
     // termination entry
@@ -454,7 +498,7 @@ SteamAPICall_t Steam_Apps::GetFileDetails( const char* pszFileName )
     if (file_exists_(pszFileName)) {
         data.m_eResult = k_EResultOK; //
         std::ifstream stream(std::filesystem::u8path(pszFileName), std::ios::binary);
-        SHA1 checksum;
+        SHA1 checksum{};
         checksum.update(stream);
         checksum.final().copy((char *)data.m_FileSHA, sizeof(data.m_FileSHA));
         data.m_ulFileSize = file_size_(pszFileName);
diff --git a/sdk/steam/isteamapps005.h b/sdk/steam/isteamapps005.h
index 6b318b21..feecd9e0 100644
--- a/sdk/steam/isteamapps005.h
+++ b/sdk/steam/isteamapps005.h
@@ -44,7 +44,7 @@ public:
 	// to users when they purchase the game, before the game ships.
 	// You'll receive an AppProofOfPurchaseKeyResponse_t callback when
 	// the key is available (which may be immediately).
-	virtual void RequestAppProofOfPurchaseKey( AppId_t nAppID ) = 0;
+	virtual void RequestAppProofOfPurchaseKey_OLD( AppId_t nAppID ) = 0;
 
 	virtual bool GetCurrentBetaName( char *pchName, int cchNameBufferSize ) = 0; // returns current beta branch name, 'public' is the default branch
 	virtual bool MarkContentCorrupt( bool bMissingFilesOnly ) = 0; // signal Steam that game files seems corrupt or missing
diff --git a/sdk/steam/isteamapps006.h b/sdk/steam/isteamapps006.h
index 1e2d2736..9f35cd78 100644
--- a/sdk/steam/isteamapps006.h
+++ b/sdk/steam/isteamapps006.h
@@ -44,7 +44,7 @@ public:
 	// to users when they purchase the game, before the game ships.
 	// You'll receive an AppProofOfPurchaseKeyResponse_t callback when
 	// the key is available (which may be immediately).
-	virtual void RequestAppProofOfPurchaseKey( AppId_t nAppID ) = 0;
+	virtual void RequestAppProofOfPurchaseKey_OLD( AppId_t nAppID ) = 0;
 
 	virtual bool GetCurrentBetaName( char *pchName, int cchNameBufferSize ) = 0; // returns current beta branch name, 'public' is the default branch
 	virtual bool MarkContentCorrupt( bool bMissingFilesOnly ) = 0; // signal Steam that game files seems corrupt or missing
diff --git a/sdk/steam/isteamapps007.h b/sdk/steam/isteamapps007.h
index 6028e1f8..5ebd0018 100644
--- a/sdk/steam/isteamapps007.h
+++ b/sdk/steam/isteamapps007.h
@@ -44,7 +44,7 @@ public:
 	// to users when they purchase the game, before the game ships.
 	// You'll receive an AppProofOfPurchaseKeyResponse_t callback when
 	// the key is available (which may be immediately).
-	virtual void RequestAppProofOfPurchaseKey( AppId_t nAppID ) = 0;
+	virtual void RequestAppProofOfPurchaseKey_OLD( AppId_t nAppID ) = 0;
 
 	virtual bool GetCurrentBetaName( char *pchName, int cchNameBufferSize ) = 0; // returns current beta branch name, 'public' is the default branch
 	virtual bool MarkContentCorrupt( bool bMissingFilesOnly ) = 0; // signal Steam that game files seems corrupt or missing
@@ -69,4 +69,18 @@ public:
 	virtual int GetAppBuildId() = 0;
 };
 
+
+
+//-----------------------------------------------------------------------------
+// Purpose: response to RegisterActivationCode()
+//-----------------------------------------------------------------------------
+struct AppProofOfPurchaseKeyResponse007_t
+{
+	enum { k_iCallback = k_iSteamAppsCallbacks + 13 };
+	EResult m_eResult;
+	uint32	m_nAppID;
+	char	m_rgchKey[ k_cubAppProofOfPurchaseKeyMax ];
+};
+
+
 #endif //ISTEAMAPPS007_H