There were no changes there; all those plugins were simply recompiled to support x64, and only a couple of them were updated, but they're all available in MPE.
If I update the links (I don't remember the exact name of the menu option), does there still not be an update? I need to check, but I think I already updated the link. And if it's installed, it...
This is a well-organized and important collection! I had a problem where the Extensions plugin offered on the MP plugin download page no longer worked with MP 1.38 (x86), but after some searching...