Actually, refresh is implemented, but the current bitmonerod.exe and simplewallet just fails silently, thus, causing the GUI not to reflect new transactions. Version 0.39.0 will solve this issue, as it uses the new daemon and rpcwallet to communicate, but it lacks the ability to create new wallets at the moment.
I just figured out something about the MoneroX GUI that I thought I'd share. It's probably obvious to people who know more about the inner workings of Monero, but it was new to me.
If someone ever takes on this project, I've realized why, when swapping out wallet files, that MoneroX seemingly gets stuck showing a question mark for the balance when starting it up. When that happens, it's simply because the wallet file is taking a long time to be refreshed. For wallet files that are a bit older, it can take a pretty long time to refresh. I'm assuming that if you close it before it finishes refreshing, it doesn't get saved, so it has to start all over again the next time.
So, what would be great is if someone implemented a simple progress bar in the GUI showing the wallet file's refresh progress information from simplewallet.exe.
To be sure, I was able to refresh a wallet I was having trouble with by manually running bitmonerod and simplewallet without using MoneroX, then saved it in simplewallet, and the next time that I ran MoneroX, the balance quickly appeared.
Unrelated to this issue is the silent crashing bug that I've mentioned before that occurs when sending a transaction. I really wish someone could figure out what the cause of this is.