When installing and running the utility for the first time make sure you have your account and shared key details to populate the initial dialog. Otherwise you will need to edit your config file to add the details in - see the example snippet below:
<add key="accounts" value="myaccount" />
<add key="rootpath" value="C:\" />
<add key="autorefreshcontainers" value="true" />
<add key="autorefreshblobs" value="true" />
<add key="defaultaccount" value="myaccount" />
<add key="myaccount.AccountSharedKey" value="mySharedKey" />
<add key="myaccount.BlobStorageEndpoint" value="http://blob.core.windows.net" />
<add key="myaccount.QueueStorageEndpoint" value="http://queue.core.windows.net" />
<add key="myaccount.TableStorageEndpoint" value="http://table.core.windows.net" />
<add key="myaccount.UsePathStyleUris" value="false" />