I can confirm what
@Riazey says, it looks like if you're logged into a github account you can get the download from the OP, but if you aren't logged in/don't have an account it just brings you to the 404 page.
I think I've also discovered another consistent graphical glitch of some kind with the QMap Editor, this time to do with rendering the tiles as they appear in MZ.
This is how the first map in the map hierarchy (map #001) looks directly in the MZ editor:
As expected, this is how it looks in the QMap Editor:
However, for other maps, it completely breaks. This happens with other maps using the MZ RTP as well as other maps using different tilesets. I've also noticed that switching between maps changes how the QMap Editor renders the maps.
This map also uses the MZ RTP:
But in the QMap Editor, it instead looks like this:
As for switching between maps changing the rendering, here's how one map looks in the MZ editor:
If I click on a map that's 100% QMap objects (nothing in the MZ editor) that use the graphics included in the VisuStella plugin sample project, and then back onto this map, this is what it shows:
If I switch back to the first map I showed (the one that renders exactly what the map looks like in the editor) and back to this one, now it looks like this in the QMap Editor:
(Sometimes, I've noticed that if I stay on that map for a few seconds, the map changes from this to the one below.)
Then, after I grabbed the screenshot, uploaded it to imgur, and pasted the link into here, going back shows that it looks like this: