Air Explorer Options give you the oportunity of change the simultaneous uploads and downloads.

Air Explorer has a default to allow you to download and upload 5 items at the same time. Changing this, is not as simple as going into Options and changing a setting.

In some cases, depending on your connection or the server, increasing the number of simultaneous downloads and uploads will increase the global speed but, if you reach your connection limit it could go even slower or affect you browser speed. We advise you to try different values to get the best permormance for your connection.

You can check more information about more features here:
-Logs in Air Explorer
-Linked browsing button in Air Explorer
-Air Explorer adds a File Properties Window
-See the free space in your clouds accounts in Air Explorer