LogViewer worker logs broken on Windows

LogViewer worker logs are broken on Windows. Attempting to access the log (e.g. http://localhost:8000/log?file=word-topo-5-1509750559%5C6701%5Cworker.log) leads to a 500 Server Error.

I've attached the LogViewer logs which show the stack trace. The issue is pretty clear from the log: on line 123 of logviewer.clj, the path is split using the path separator as a regex. This is fine on Posix systems as / is a normal character in regex; however, on Windows, backslash is the path separator. As this is also the regex escape character, it is not a valid regular expression.