With the release of tsce-0.2.2 and the testing that's taken place so far, tsce is not strictly alpha code any longer. It could still use a lot of further testing, and may still be unstable, but it should be a lot better off, now.
The tsce-0.2.1-setup.exe had the wrong version of pygtk bundled, resulting in weird behavior. The link to this has been deleted. tsce-0.2.1-setup-build-2.exe will replace it.
Windows installer posted. Works for me. Your mileage may vary.
The Windows installation instructions were incorrect. New instructions in the README posted here, the ones in 0.1.3.1 are incorrect.
BESM3 support should be complete as of 0.1.3.1, as long as you don't mind really ugly character sheets.
Alpha code, your mileage may vary.