diff --git a/windows/Sources/FabricSandbox/JniEntrypoint.swift b/windows/Sources/FabricSandbox/JniEntrypoint.swift
index 01ce8d2..39e451b 100644
--- a/windows/Sources/FabricSandbox/JniEntrypoint.swift
+++ b/windows/Sources/FabricSandbox/JniEntrypoint.swift
@@ -2,12 +2,11 @@ import Jni
 import WinSDK
 
 @_cdecl("Java_net_fabricmc_sandbox_Main_nativeEntrypoint")
-public func entrypoint(env: UnsafeMutablePointer<JNIEnv>, clazz: jclass!) {
+public func entrypoint(jni: UnsafeMutablePointer<JNIEnv>, clazz: jclass!) {
   do {
     try FabricSandbox().run()
   } catch {
-    var jni = env.pointee
-    let runtimeException = jni.FindClass("java/lang/RuntimeException")!
-    let _ = jni.ThrowNew(runtimeException, "\(error)")
+    let runtimeException = jni.pointee.FindClass("java/lang/RuntimeException")!
+    let _ = jni.pointee.ThrowNew(runtimeException, "\(error)")
   }
 }
diff --git a/windows/Sources/FabricSandbox/String+Jni.swift b/windows/Sources/FabricSandbox/String+Jni.swift
deleted file mode 100644
index e3553ea..0000000
--- a/windows/Sources/FabricSandbox/String+Jni.swift
+++ /dev/null
@@ -1,11 +0,0 @@
-import Jni
-
-extension String {
-  // Construct a String from a jstring
-  init(_ env: UnsafeMutablePointer<JNIEnv>, jstring: jstring!) {
-    var jni = env.pointee
-    let chars = jni.GetStringChars(jstring, nil)!
-    defer { jni.ReleaseStringChars(jstring, chars) }
-    self = String(decodingCString: chars, as: UTF16.self)
-  }
-}
diff --git a/windows/Sources/Sandbox/AppContainer.swift b/windows/Sources/Sandbox/AppContainer.swift
index 3d17a4b..83e9530 100644
--- a/windows/Sources/Sandbox/AppContainer.swift
+++ b/windows/Sources/Sandbox/AppContainer.swift
@@ -42,6 +42,9 @@ public class AppContainer {
     }
     */
 
+    // Fow now delete an existing container if it exists
+    let _ = _DeleteAppContainerProfile(name.wide)
+
     var capabilities = attributes.map { $0.sidAttributes }
     var sid: PSID? = nil
     let result = capabilities.withUnsafeMutableBufferPointer { capabilities in