Error: EPERM: operation not permitted, rename '_update-4.0.0.zip' -> 'update-4.0.0.zip'

[greghesp]

This seems to happen on Windows machines. I've tried running cmd as admin, but it didn't make much difference

internal/fs/utils.js:308
    throw err;
    ^

Error: EPERM: operation not permitted, rename '_update-4.0.0.zip' -> 'update-4.0.0.zip'
    at Object.renameSync (fs.js:772:3)
    at WriteStream.<anonymous> (C:\Users\Greg\Downloads\assistant-relay-4\node_modules\auto-updater\auto-updater.js:499:10)
    at WriteStream.emit (events.js:327:22)
    at finish (_stream_writable.js:657:10)
    at finishMaybe (_stream_writable.js:644:9)
    at _stream_writable.js:617:7
    at WriteStream._final (internal/fs/streams.js:355:3)
    at callFinal (_stream_writable.js:610:10)
    at processTicksAndRejections (internal/process/task_queues.js:80:21) {
  errno: -4048,
  syscall: 'rename',
  code: 'EPERM',
  path: '_update-4.0.0.zip',
  dest: 'update-4.0.0.zip'
}