Plutonium

Plutonium.Updater.Core.Models.UpdateException: Failed to update file storage/iw5/video/plutonium.bik ---> System.Net.WebException: An exception occurred during a WebClient request. ---> System.IO.IOException: The decryption operation failed, see inner exception. ---> System.ComponentModel.Win32Exception: The specified data could not be decrypted
Just gavev me that after doing that

Faiiled to download file storage/iw5/mp_nuked.iwd
Plutonium.Updater.Core.Models.UpdateException: Failed to update file storage/iw5/mp_nuked.iwd ---> System.Net.WebException: An exception occurred during a WebClient request. ---> System.IO.IOException: The decryption operation failed, see inner exception. ---> System.ComponentModel.Win32Exception: The specified data could not be decrypted
--- End of inner exception stack trace ---
at System.Net.ConnectStream.EndRead(IAsyncResult asyncResult)
at System.Net.WebClient.DownloadBitsReadCallbackState(DownloadBitsState state, IAsyncResult result)
--- End of inner exception stack trace ---
at System.Runtime.ExceptionServices.ExceptionDispatchInfo.Throw()
at Plutonium.Updater.Core.Updater.<Run>d__23.MoveNext()
--- End of inner exception stack trace ---
at Plutonium.Updater.Core.Updater.<Run>d__23.MoveNext()
--- End of stack trace from previous location where exception was thrown ---
at System.Runtime.ExceptionServices.ExceptionDispatchInfo.Throw()
at System.Runtime.CompilerServices.TaskAwaiter.HandleNonSuccessAndDebuggerNotification(Task task)
at Plutonium.Updater.App.Windows.UpdateWindow.<UpdateWindow_Loaded>d__6.MoveNext()

That pops up everytime I try to open it, I've turned on anti virus, I have allowed access to it through security, Ive ran it as administrator and I've reinstalled, fully deleted it entirely from files etc. I've done every solution that I'vve read about and nothing works