I downloaded the Beta installer.
If I choose 'Download an Install' I get an error message:
An unhandled exception just occurred:Value cannot be null.
Parameter name: String
If I choose 'Download' it works but it wasn't obvious where it put the files. I had to run it again before noticing the text at the bottom of the window.
The download comes in two zip files but it isn't noted anywhere that the PowerBuilderIDE folder has to be under the CommonFiles folder for it to work.