Maybe I'm speaking out of turn and I'm definitely missing something but I doubt creepy limitation is a fair description.
Click start when you start work and click finish when you finish work and as the work is recorded against a day/date and there's only 24 hours in a day.....
and if tomorrow you're going to work on the same project, then tomorrow you can just click start again and it will copy and start for you then, y'know cause that's when you're working?
Maybe a clearer description of the use case and what you're expecting might be helpful for a better answer. It seems (or at least how I'm reading it) that you want to define a project, click start and then a month later when you've finished the project, just click stop and have Time Master just know how many hours you've done.