The syntax highlighting is broken, because the lua files are in the wrong folder. In the lua folder there is another lua folder that shouldn't be in there but in the top level.
@Paupasia: Old particles ? They are removed, as long you don't touch them they will still play, but get overwritten once you open them in the editor.
The custom icon should be a quatratic png/webp and no ico.
Retry downloading the Mac player. It's working here, the system checks the hash of the file. The files are now in C:\Users\<user>\AppData\Local\Visionaire Editor\platform and must be linked in the viseditor.ini with the date.
[Platform]
MacVersion=2017-04-13T07:46:36Z
Also the links in the wiki are only for version 4.2.5 and version 5 is only distributed via the update server.
Subfolders work, if you want the files to be placed there, you need to change the rule on the bottom, e.g. Scenes\Scene<3c>.vs instead of Scene<3c>.vs
The flash of the fades I'm seeing just now, didn't about that before.