Having Tempo downloaded from github, will get you a total of 3 files

you can put them on whatever place, you can put both .exes where the uproject is because its easier to get the json file later.
after putting the exes on the uproject location, you have to follow the next steps:
Make sure there is nothing selected, then:
Reproduction example:

notice the “.tempo.json”. You can name the json whatever you want and it should work.
You can press the “UP Arrow key” of your keyboard to get the command back. You can do this much more quicker now.
Can be many things, either .tempo.json is not in the uproject location (which the execution above is based on) or json contents is incorrect (path may be invalid).