Download the zip, unpack it somewhere, set security and apiUi and apiUiServer are available for you.
For some reason on some Windows10 machines, directly starting the apiUi.exe from an Explorer will fail. I cannot reproduce this behaviour on my developement machine but by coincidence I found a workaround. If starting apiUi fails or it startsup but is instable, then
- either start apiUi.bat instead
- or run apiUi as administrator