IOException on Dispose() method calling

I'm trying to start Mongo2Go as following:

``` csharp
 MongoDbRunner.Start(dataPath);
```

It works fine, but throws IOException on callings `Dispose()` method ("...unable to access local.0 file...").

At the same time `MongoDbRunner.StartForDebugging(dataPath)` works ok.

Looks like mongo process still running when trying to delete data files in case of `.Start()` method.
