After installing TTD from GOG I panicked a bit, not seeing any DOSBox or DOS files. For a moment I thought it was files from an old Windows 95 version only, but there was (also) a DOS installer (INSTALL.EXE). I ran that, went through all the usual steps (select Sound Blaster IRQs and so on) and now I can run it from my virtual (git-managed) DOS disk install directory where I install all my DOS games and applications. Next to the original TT that I installed a few months ago from an old CD-ROM. For completeness.