Plutonium

Here is what it says:

Crash ID: d2c11c6101454fb68c9712431b87b95b
Plutonium.Updater.Core.Models.UpdateException: Failed to update file bin/plutonium-launcher-win32.exe ---> System.IO.IOException: The process cannot access the file 'C:\Users\edwar\AppData\Local\Plutonium\bin\plutonium-launcher-win32.exe' because it is being used by another process.
at System.IO.__Error.WinIOError(Int32 errorCode, String maybeFullPath)
at 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)
at System.IO.FileStream..ctor(String path, FileMode mode, FileAccess access, FileShare share, Int32 bufferSize, FileOptions options, String msgPath, Boolean bFromProxy, Boolean useLongPath, Boolean checkHost)
at System.IO.File.InternalWriteAllBytes(String path, Byte[] bytes, Boolean checkHost)
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()

Hello mods, devs, and fellow basement dwellers. First of all god bless this project! Thank you so much for helping me and my friends connect again! But alas we wanted to mess around with mods and play custom maps but we didn't know how to do either. I tried getting a mod but even after searching my whole computer, I don't have a t6rzm.exe or t6rmp.exe anywhere on my system. And my other friend who we tasked with trying to find out how to get maps said he wasn't able to for whatever reason. Could you guys help me out? Thank you for any support you are able to give!