Windows Error

[AemoSucks]

Receiving the following whenever I either exit the game or logout to the character select screen:

System.IO.IOException: The process cannot access the file 'C:\Program Files (x86)\World of Warcraft_classic_\WTF\Account\NAMEOFACCT\SavedVariables\CensusPlusClassic.lua' 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)
at System.Net.WebClient.OpenFileInternal(Boolean needsHeaderAndBoundary, String fileName, FileStream& fs, Byte[]& buffer, Byte[]& formHeaderBytes, Byte[]& boundaryBytes)
at System.Net.WebClient.UploadFileAsync(Uri address, String method, String fileName, Object userToken)