Swift Explorer - File Not Yet Available
Unfortunately the file you are trying to download is not available yet. It should be ready shortly, though.
In the meantime, you can use the executable jar file.
Note that the executable jar file requires the JRE 8 or later, which can be currently downloaded for Linux (x86, x64), Mac OS X, Solaris (SPARC 64-bit, x64) and Windows (x86, x64).