Hello, i got the same problem when starting up osu aswell since the update today, after the update the application keeps starts up on the "Your client is up to date page" and closes.
Cant even open the game from now on. I even restarted my pc and it wont work also.
My log:
Application: osu!.exe
Framework Version: v4.0.30319
Description: The process was terminated due to an unhandled exception.
Exception Info: System.AccessViolationException
at System.IO.__Error.WinIOError(Int32, System.String)
at System.IO.FileStream.WriteCore(Byte[], Int32, Int32)
at System.IO.FileStream.FlushInternalBuffer()
at System.IO.FileStream.Flush(Boolean)
at System.IO.FileStream.Flush()
at System.IO.StreamWriter.Flush(Boolean, Boolean)
at System.IO.StreamWriter.Dispose(Boolean)
at System.IO.TextWriter.Dispose()
at System.IO.File.InternalWriteAllLines(System.IO.TextWriter, System.Collections.Generic.IEnumerable`1<System.String>)
at System.IO.File.AppendAllLines(System.String, System.Collections.Generic.IEnumerable`1<System.String>)
at #=zcrGuFG_jxMZY4l3iM7hpEbU=+#=zBFtqTADZbQ7ugZ3i3UGvaIw=.#=zxQA2FtIURu$H()
at #=ztiCBp_1os07$a3IUfSqP1wg=.#=z4twI9og=()
at #=zCbRYNtU7lqKznzccAh4gefI=+#=z6pAqvtnlf8QoDKxcXQ==.#=zN$J$o4FdElGzvvE2OQ==()
at System.Threading.ThreadHelper.ThreadStart_Context(System.Object)
at System.Threading.ExecutionContext.RunInternal(System.Threading.ExecutionContext, System.Threading.ContextCallback, System.Object, Boolean)
at System.Threading.ExecutionContext.Run(System.Threading.ExecutionContext, System.Threading.ContextCallback, System.Object, Boolean)
at System.Threading.ExecutionContext.Run(System.Threading.ExecutionContext, System.Threading.ContextCallback, System.Object)
at System.Threading.ThreadHelper.ThreadStart()