diff --git a/vrclient_x64/vrclient_x64/json_converter.cpp b/vrclient_x64/vrclient_x64/json_converter.cpp
index 076d95b3..83fd2ec0 100644
--- a/vrclient_x64/vrclient_x64/json_converter.cpp
+++ b/vrclient_x64/vrclient_x64/json_converter.cpp
@@ -106,4 +106,41 @@ char *json_convert_paths(const char *input)
     return NULL;
 }
 
+char *json_convert_startup_info(const char *startup_info)
+{
+    char dst_path[PATH_MAX];
+    std::string src_path;
+    Json::Reader reader;
+    Json::Value root;
+    size_t len;
+    char *ret;
+
+    if(!startup_info || !reader.parse(startup_info, root))
+        return NULL;
+
+    if (!root.isMember("action_manifest_path") || !root["action_manifest_path"].isString())
+        return NULL;
+
+    src_path = root["action_manifest_path"].asString();
+    WINE_TRACE("action_manifest_path %s.\n", src_path.c_str());
+
+    if (!vrclient_dos_path_to_unix_path(src_path.c_str(), dst_path))
+    {
+        WINE_ERR("error converting path %s.\n", src_path.c_str());
+        return NULL;
+    }
+    WINE_TRACE("converted path %s.\n", dst_path);
+
+    root["action_manifest_path"] = dst_path;
+
+    Json::FastWriter writer;
+
+    std::string contents(writer.write(root));
+    ret = (char *)malloc(contents.length() + 1);
+    len = contents.copy(ret, contents.length());
+    ret[len] = 0;
+
+    return ret;
+}
+
 }
diff --git a/vrclient_x64/vrclient_x64/vrclient_main.c b/vrclient_x64/vrclient_x64/vrclient_main.c
index 419b1474..699461d3 100644
--- a/vrclient_x64/vrclient_x64/vrclient_main.c
+++ b/vrclient_x64/vrclient_x64/vrclient_main.c
@@ -374,13 +374,19 @@ EVRInitError ivrclientcore_init(EVRInitError (*cpp_func)(void *, EVRApplicationT
         void *linux_side, EVRApplicationType application_type, const char *startup_info,
         unsigned int version, struct client_core_data *user_data)
 {
+    char *startup_info_converted;
     EVRInitError error;
 
     TRACE("%p, %#x, %p\n", linux_side, application_type, startup_info);
 
+    startup_info_converted = json_convert_startup_info(startup_info);
     InitializeCriticalSection(&user_data->critical_section);
 
-    error = cpp_func(linux_side, application_type, startup_info);
+    error = cpp_func(linux_side, application_type, startup_info_converted
+            ? startup_info_converted : startup_info);
+
+    free(startup_info_converted);
+
     if (error)
         WARN("error %#x\n", error);
     return error;
@@ -1453,11 +1459,15 @@ uint32_t ivrcompositor_get_vulkan_device_extensions_required(
         void *linux_side, VkPhysicalDevice_T *phys_dev, char *value, uint32_t bufsize,
         unsigned int version)
 {
+    uint32_t ret;
+
     load_vk_unwrappers();
 
     phys_dev = get_native_VkPhysicalDevice(phys_dev);
 
-    return cpp_func(linux_side, phys_dev, value, bufsize);
+    ret = cpp_func(linux_side, phys_dev, value, bufsize);
+    TRACE("ret %u, value %s.\n", ret, value);
+    return ret;
 }
 
 #pragma pack( push, 8 )
diff --git a/vrclient_x64/vrclient_x64/vrclient_private.h b/vrclient_x64/vrclient_x64/vrclient_private.h
index f0cb8867..b4e0af0e 100644
--- a/vrclient_x64/vrclient_x64/vrclient_private.h
+++ b/vrclient_x64/vrclient_x64/vrclient_private.h
@@ -11,6 +11,9 @@ extern "C" {
 #endif
 
 char *json_convert_paths(const char *input);
+char *json_convert_startup_info(const char *startup_info);
+
+bool vrclient_dos_path_to_unix_path(const char *src, char *dst);
 
 #if __cplusplus
 }
@@ -48,7 +51,6 @@ typedef struct __winX winX;
 
 void *create_win_interface(const char *name, void *linux_side);
 unsigned int vrclient_unix_path_to_dos_path(bool api_result, const char *src, char *dst, uint32_t dst_bytes);
-bool vrclient_dos_path_to_unix_path(const char *src, char *dst);
 void *create_LinuxMatchmakingServerListResponse(void *win);
 
 #ifndef __cplusplus
diff --git a/vrclient_x64/vrclient_x64/winIVRCompositor.c b/vrclient_x64/vrclient_x64/winIVRCompositor.c
index eae87067..9116eceb 100644
--- a/vrclient_x64/vrclient_x64/winIVRCompositor.c
+++ b/vrclient_x64/vrclient_x64/winIVRCompositor.c
@@ -302,8 +302,12 @@ void __thiscall winIVRCompositor_IVRCompositor_026_UnlockGLSharedTextureForAcces
 DEFINE_THISCALL_WRAPPER(winIVRCompositor_IVRCompositor_026_GetVulkanInstanceExtensionsRequired, 12)
 uint32_t __thiscall winIVRCompositor_IVRCompositor_026_GetVulkanInstanceExtensionsRequired(winIVRCompositor_IVRCompositor_026 *_this, char * pchValue, uint32_t unBufferSize)
 {
+    uint32_t ret;
+
     TRACE("%p\n", _this);
-    return cppIVRCompositor_IVRCompositor_026_GetVulkanInstanceExtensionsRequired(_this->linux_side, pchValue, unBufferSize);
+    ret = cppIVRCompositor_IVRCompositor_026_GetVulkanInstanceExtensionsRequired(_this->linux_side, pchValue, unBufferSize);
+    TRACE("ret %u, value %s.\n", ret, pchValue);
+    return ret;
 }
 
 DEFINE_THISCALL_WRAPPER(winIVRCompositor_IVRCompositor_026_GetVulkanDeviceExtensionsRequired, 16)
@@ -1314,7 +1318,12 @@ DEFINE_THISCALL_WRAPPER(winIVRCompositor_IVRCompositor_022_GetVulkanInstanceExte
 uint32_t __thiscall winIVRCompositor_IVRCompositor_022_GetVulkanInstanceExtensionsRequired(winIVRCompositor_IVRCompositor_022 *_this, char * pchValue, uint32_t unBufferSize)
 {
     TRACE("%p\n", _this);
-    return cppIVRCompositor_IVRCompositor_022_GetVulkanInstanceExtensionsRequired(_this->linux_side, pchValue, unBufferSize);
+    uint32_t ret;
+
+    TRACE("%p\n", _this);
+    ret = cppIVRCompositor_IVRCompositor_022_GetVulkanInstanceExtensionsRequired(_this->linux_side, pchValue, unBufferSize);
+    TRACE("ret %u, value %s.\n", ret, pchValue);
+    return ret;
 }
 
 DEFINE_THISCALL_WRAPPER(winIVRCompositor_IVRCompositor_022_GetVulkanDeviceExtensionsRequired, 16)