Error Message, when I try to import my mesh

Hello everyone,

I hope someone can help me out with this?

When I want to import my mesh I get an Error Message:

The Sims 4 Studio - Version 3.1.4.5
System.AggregateException: Mindestens ein Fehler ist aufgetreten. ---> System.IO.IOException: Der Prozess kann nicht auf die Datei "C:\ProgramData\S4Studio\Scripts\geomexporter.py" zugreifen, da sie von einem anderen Prozess verwendet wird.
bei System.IO.__Error.WinIOError(Int32 errorCode, String maybeFullPath)
bei System.IO.FileStream.Init(String path, FileMode mode, FileAccess access, Int32 rights, Boolean useRights, FileShare share, Int32 bufferSize, FileOptions options, SECURITY_ATTRIBUTES secAttrs, String msgPath, Boolean bFromProxy, Boolean useLongPath, Boolean checkHost)
bei System.IO.FileStream..ctor(String path, FileMode mode, FileAccess access, FileShare share, Int32 bufferSize)
bei S4Studio.Blender.BlenderUtilities.ImportGeom(String custom_blend, String custom_geom, Int32 body_type, String cut)
bei S4Studio.ViewModels.CAS.CASLODItem.ImportMesh(BlenderUtilities blender_util, String blender_path)
bei S4Studio.ViewModels.CAS.CASStandalone.<>c__DisplayClass71_0.<ExecuteImportMesh>b__0()
bei System.Threading.Tasks.Task.InnerInvoke()
bei System.Threading.Tasks.Task.Execute()
--- Ende der internen Ausnahmestapelüberwachung ---
---> (Interne Ausnahme #0) System.IO.IOException: Der Prozess kann nicht auf die Datei "C:\ProgramData\S4Studio\Scripts\geomexporter.py" zugreifen, da sie von einem anderen Prozess verwendet wird.
bei System.IO.__Error.WinIOError(Int32 errorCode, String maybeFullPath)
bei System.IO.FileStream.Init(String path, FileMode mode, FileAccess access, Int32 rights, Boolean useRights, FileShare share, Int32 bufferSize, FileOptions options, SECURITY_ATTRIBUTES secAttrs, String msgPath, Boolean bFromProxy, Boolean useLongPath, Boolean checkHost)
bei System.IO.FileStream..ctor(String path, FileMode mode, FileAccess access, FileShare share, Int32 bufferSize)
bei S4Studio.Blender.BlenderUtilities.ImportGeom(String custom_blend, String custom_geom, Int32 body_type, String cut)
bei S4Studio.ViewModels.CAS.CASLODItem.ImportMesh(BlenderUtilities blender_util, String blender_path)
bei S4Studio.ViewModels.CAS.CASStandalone.<>c__DisplayClass71_0.<ExecuteImportMesh>b__0()
bei System.Threading.Tasks.Task.InnerInvoke()
bei System.Threading.Tasks.Task.Execute()<---

(My S4S is english but it still shows the Message german because my Windows is german)

It says it can't access a file etc because it would be in use in some way, but its not. The mesh I want to import is of the same dress but edited. I tried with closing everything and it can load another mesh where I didnt change much. I don't know if I accidently messed some settings up by edditing the mesh but even when I try editing the mesh that works, it then says it doesnt work. It always worked before and I don't know what I did wrong :(

Please say if you have any ideas and if I need to explain further what I did