In Client mode, the WiFi adapter does not have its own IP address so you can’t log in to re-configure it. The only way to re-configure it is to physically press the reset button on the adapter.
There are other adapters that I’ve seen that do have its own IP address in client mode. One example is the Netgear WNCE2001. This should allow you to log in and re-configure it when needed.
Another choice is to use powerline networking adapters like this:
http://www.amazon.com/TP-LINK-TL-PA2010KIT-Powerline-Adapter-Starter/dp/B00AWRUIY4/
which essentially creates a wired network through your power line. It requires no setup since it’s not wireless. It’s worth a try.