I tried to install version 1.23.0 (x64) on new machine with Windows 8.1 (x64)
I unzipped the zip file and run install.jar
After choose the default folder for installation (C:\Program Files\Jthink\SongKong) the installer fails with the message "This directory cannot be written (...)"
I restarted the machine and tried again without success.
Finally I managed to install doing the following. Open Command Line (as Administrator) and there run "java -jar install.jar"
I report this just in case something need help with the same problem.