Version 4.12.7 yep, tried putting it in the root game directory and the BepinEx/plugins directory, neither had any effect, unsure why
Incase this can help, here's what the bepinex console output when i loaded the game:
[Message: Preloader] BepInEx 6.0.0-be.738 - SuccubusSistersVR (2025-09-28 11:58:37)
[Message: Preloader] Built from commit af0cba71fb69324aa4dfd651422bfa020309ce15
[Info : BepInEx] System platform: Windows 10 64-bit
[Info : BepInEx] Process bitness: 64-bit (x64)
[Info : BepInEx] Running under Unity 6000.0.28f1
[Info : BepInEx] Runtime version: 6.0.7
[Info : BepInEx] Runtime information: .NET 6.0.7
[Info : Preloader] 0 patcher plugins loaded
[Info : Preloader] 0 assemblies discovered
[Message:AssemblyPatcher] Executing 0 patch(es)
[Message: BepInEx] Chainloader initialized
[Warning:Il2CppInterop] Class::Init signatures have been exhausted, using a substitute!
[Info :Il2CppInterop] Registered mono type Il2CppInterop.Runtime.DelegateSupport+Il2CppToMonoDelegateReference in il2cpp domain
[Info : BepInEx] 1 plugin to load
[Info : BepInEx] Loading [DumbRendererDemosaic 1.7.0]
[Info :Il2CppInterop] Registered mono type DumbRendererDemosaic.DumbRendererDemosaic in il2cpp domain
[Message: BepInEx] Chainloader startup complete
[Message: Unity] Applying Acoustic Propagation Settings: [acoustic model = Automatic], [diffraction = True],
[Message: Unity] Meta XR Audio Native Interface initialized with Unity plugin
[Message: Unity] Setting spatial voice limit: 64
[Warning: Unity] No active UnityEngine.XR.ARSubsystems.XRSessionSubsystem is available. This feature is either not supported on the current platform, or you may need to enable a provider in <b>Project Settings</b> > <b>XR Plug-in Management</b>.
[Warning: Unity] No active UnityEngine.XR.XRInputSubsystem is available. Please ensure that a valid loader configuration exists in the XR project settings.
[Warning: Unity] No active UnityEngine.XR.ARSubsystems.XRCameraSubsystem is available. This feature is either not supported on the current platform, or you may need to enable a provider in <b>Project Settings</b> > <b>XR Plug-in Management</b>.
[Warning: Unity] Your project uses a scriptable render pipeline. You can use Camera.stereoTargetEye only with the built-in renderer.
[Warning: Unity] Mass variation between the Rigidbodies in the ragdoll is more than 100 times. This might cause instability and unwanted results with Rigidbodies connected by Joints. Min mass: 0.495, max mass: 50
[Warning: Unity] Mass variation between the Rigidbodies in the ragdoll is more than 100 times. This might cause instability and unwanted results with Rigidbodies connected by Joints. Min mass: 0.495, max mass: 50
[Info :Il2CppInterop] Registered mono type BepInEx.Unity.IL2CPP.Utils.Collections.Il2CppManagedEnumerator in il2cpp domain
[Warning: Unity] Time.fixedDeltaTime is set to Unity's default of 0.02, which can cause jittery movement in VR, especially with Rotations. Setting to device refresh rate instead. You can disable this by adjusting your Fixed Timestep manually in your project or via script.
[Message: Unity] <color=red>Buttplug:</color> Trying to create client
[Message: Unity] Using connection type WebsocketServerProcess.
[Message: Unity] Bringing up Buttplug Server/Client
[Message: Unity] Setting websocket port to 47952
[Message: Unity] Starting task with arguments: --wsinsecureport 47952 --pingtime 0
[Message: Unity] Got process exception. If this is IL2CPP, this is expected and Ok. Printing exception and retrying using kernel32 P/Invoke methods.
[Message: Unity] System.ComponentModel.Win32Exception (0x80004005): ApplicationName='C:/Users/user/Downloads/SuccubusSistersAndCountdownSexVR_Demo/SuccubusSistersVR_Data/StreamingAssets\Buttplug\IntifaceCLI.exe', CommandLine='--wsinsecureport 47952 --pingtime 0', CurrentDirectory='', Native error= Success
at System.Diagnostics.Process.StartWithCreateProcess (System.Diagnostics.ProcessStartInfo startInfo) [0x00000] in <00000000000000000000000000000000>:0
at ButtplugUnity.ButtplugUnityHelper.StartProcessAndCreateClient (ButtplugUnity.ButtplugUnityClient client, ButtplugUnity.ButtplugUnityOptions options) [0x00000] in <00000000000000000000000000000000>:0
at System.Runtime.CompilerServices.AsyncTaskMethodBuilder.Start[TStateMachine] (TStateMachine& stateMachine) [0x00000] in <00000000000000000000000000000000>:0
at ButtplugUnity.ButtplugUnityHelper.StartProcessAndCreateClient (ButtplugUnity.ButtplugUnityClient client, ButtplugUnity.ButtplugUnityOptions options) [0x00000] in <00000000000000000000000000000000>:0
at ButtplugMy_System.Start () [0x00000] in <00000000000000000000000000000000>:0
at System.Runtime.CompilerServices.AsyncVoidMethodBuilder.Start[TStateMachine] (TStateMachine& stateMachine) [0x00000] in <00000000000000000000000000000000>:0
at ButtplugMy_System.Start () [0x00000] in <00000000000000000000000000000000>:0
[Message: Unity] Connecting client
[Message: Unity] Meta XR Audio Native Interface initialized with Unity plugin
[Message: Unity] RenderGraph is now disabled.
[Info

umbRendererDemosaic] Disabling mozaic renderer Model_Otoko/Item/Mozaikus/Mozaiku_Tin
[Info

umbRendererDemosaic] Disabling mozaic renderer Model_Otoko/Item/Mozaikus/Mozaiku_Tama (1)
[Info

umbRendererDemosaic] Disabling mozaic renderer Model_Otoko/Item/Mozaikus/Mozaiku_Tin (1)
[Info

umbRendererDemosaic] Disabling mozaic renderer Milltina_Imouto Root/Milltina_Imouto/Armature/Hips/HipItems/Mozaiku_Vagina
[Info

umbRendererDemosaic] Disabling mozaic renderer Milltina_Ane Root/Milltina_Ane/Armature/Hips/HipItems/Mozaiku_Vagina
[Info

umbRendererDemosaic] Disabling mozaic renderer Model_Otoko/Item/Mozaikus/Mozaiku_Tin (2)
[Info

umbRendererDemosaic] Disabling mozaic renderer Model_Otoko/Item/Mozaikus/Mozaiku_Tama
[Warning: Unity] No subsystems detected. Unable to set Tracking Origin to Unbounded
[Message: Unity] Connected client