There is no "end sim" (see: halting problem). However, you can use the retimer to constrain playback to a certain set of frames, so if you want the sim to go from frame 0-100, set a linear curve on the retimer frame value from 0-100. tyFlow will then playback those frames and not sim past 100.
Also if you're setting particles to kinematic, don't forget to put a Stop operator on them too, to kill any residual velocities/spin.
Also if you're setting particles to kinematic, don't forget to put a Stop operator on them too, to kill any residual velocities/spin.