Anyone who has trouble, don't forget that this server likes to drop connections during download, so if your file sizes don't match the promised size at beginning of dl, do it over again. I'm getting new version now... hopefully it'll work better on my PC that can't run the old version without breaking the other PC that can run it.
Well on this (could run it) PC, with AppLocale (changing locale in Win8 causes issues unlike 7 where I can leave it on Jpn all the time), text is messed, but it seems to run okay. It also runs smoothly in fullscreen now, whereas before it would get 40fps even in the menu. But when in fullscreen it doesn't show the backgrounds now, so I still have to use window anyway. Will try other PC which couldn't and is Japanese locale tomorrow.
Update: I get 60fps on my other PC now too! I didn't try a whole game, but previously it would lag any time more than 5 fairies were on screen, and no longer. Text also works properly in true Japanese locale.