USB Loader GX won't load games it previously did

Got into this piece of shit siutuation: USB Loader GX won't load games it previously did, just like a lot of people experienced in this forum thread.

It all started yesterday when I got "the Last Story" JAP edition.  I tried to install the game but got in some crazy error while ripping it.  Rebooted the machine and found that the entry was there, but everytime I selected it, it hangs up the whole machine. 

Eventually I decided to update the USB Loader GX to the latest version.  That seemed solved the problem.  I was able to erase the problem entry, and also able to install the game "the Last Story".

The problem, though, is that afterward there are quite some games that DOES NOT RUN anymore.  For instance, New Super Mario Bros was hanging after I selected the level.  Mario Kart Wii was plain NOT WORKING, giving me the black screen,

Interesting enough, not all games are dead.  Super Mario Galaxy 2, for instance, was working great.  So I am now in a very odd limbo situation.

I am now trying to delete and reinstall Mario Kart Wii and see if that will help solving the problem.