diff --git a/src/UniversalValveToolbox/UI/FormMain.cs b/src/UniversalValveToolbox/UI/FormMain.cs
index b3387e7..b938cde 100644
--- a/src/UniversalValveToolbox/UI/FormMain.cs
+++ b/src/UniversalValveToolbox/UI/FormMain.cs
@@ -71,6 +71,9 @@ namespace UniversalValveToolbox {
 
                 var indexProject = comboBoxProjects.Items.IndexOf(lastSelectedProject.Name);
                 comboBoxProjects.SelectedIndex = indexProject;
+
+                EnvUtils.PrepareVProject($"{SelectedProject?.Path ?? ""}");
+                EnvUtils.PrepareSFMData($"{SelectedProject?.Path ?? ""}");
             }
         }
         private void SaveLastSelectedProject() {
@@ -363,11 +366,14 @@ namespace UniversalValveToolbox {
             var selectItem = listView.SelectedItems[0];
 
             var selectItemText = selectItem.Text;
+            EnvUtils.PrepareVProject($"{SelectedProject?.Path ?? ""}");
+            EnvUtils.PrepareSFMData($"{SelectedProject?.Path ?? ""}");
 
             if (selectItem.Group == listViewGroupTools) {
                 if (RUN_PROJECT_ID.Equals(selectItem.Tag) && SelectedProject != null) {
                     var pathEngineBin = Path.Combine(SteamPathsUtil.GetSteamAppManifestDataById(SelectedEngine.Appid).Path, SelectedEngine.Bin);
 
+                    
                     Process.Start(pathEngineBin, $"-steam -game \"{SelectedProject?.Path ?? ""}\" {SelectedProject.Args}");
                 }
 
diff --git a/src/UniversalValveToolbox/UniversalValveToolbox.csproj b/src/UniversalValveToolbox/UniversalValveToolbox.csproj
index 80a97be..752a17c 100644
--- a/src/UniversalValveToolbox/UniversalValveToolbox.csproj
+++ b/src/UniversalValveToolbox/UniversalValveToolbox.csproj
@@ -154,6 +154,7 @@
       <SubType>Component</SubType>
     </Compile>
     <Compile Include="UI\View\IconComboBoxItem.cs" />
+    <Compile Include="Utils\EnvUtils.cs" />
     <Compile Include="Utils\JsonFileUtil.cs" />
     <Compile Include="Utils\LanguageManager.cs" />
     <Compile Include="Model\Dto\ToolDtoModel.cs" />
diff --git a/src/UniversalValveToolbox/Utils/EnvUtils.cs b/src/UniversalValveToolbox/Utils/EnvUtils.cs
new file mode 100644
index 0000000..18f68e6
--- /dev/null
+++ b/src/UniversalValveToolbox/Utils/EnvUtils.cs
@@ -0,0 +1,44 @@
+using EpicMorg.SteamPathsLib;
+using System;
+using System.Collections.Generic;
+using System.IO;
+using System.Linq;
+using System.Text;
+using System.Threading.Tasks;
+
+namespace UniversalValveToolbox.Utils {
+    class EnvUtils {
+        public static void PrepareVProject(string data) {
+            Environment.SetEnvironmentVariable("VProject", data, EnvironmentVariableTarget.User);
+        }
+
+        public static void PrepareVMod(string data) {
+            Environment.SetEnvironmentVariable("VMod", data, EnvironmentVariableTarget.User);
+        }
+
+        public static void PrepareVGame(string data) {
+            Environment.SetEnvironmentVariable("VGame", data, EnvironmentVariableTarget.User);
+        }
+
+        public static void PrepareVContent(string data) {
+            Environment.SetEnvironmentVariable("VContent", data, EnvironmentVariableTarget.User);
+        }
+
+        public static void PrepareVTools(string data) {
+            Environment.SetEnvironmentVariable("VTools", data, EnvironmentVariableTarget.User);
+        }
+
+        public static void PrepareSFMData(string pathProject) {
+            var SFMpath = SteamPathsUtil.GetSteamAppManifestDataById(1840)?.Path;
+
+            if (SFMpath == null)
+                return;
+
+            PrepareVMod(Path.GetDirectoryName(pathProject));
+            PrepareVProject(pathProject);
+            PrepareVContent(Path.Combine(SFMpath, "content"));
+            PrepareVGame(Path.Combine(SFMpath, "game"));
+            PrepareVTools(Path.Combine(SFMpath, "game", "sdktools"));
+        }
+    }
+}