Settings in the Help/About dialog:

Automatically check for updates

Check for new versions of TurbulenceFD automatically. It is recommended to leave this option enabled, especially during the Beta phase.

When a new version becomes available, you will be notified so you can decide whether to update.

Ask before overwriting simulation cache

If the currently selected cache is not empty and you start a simulation, TurbulenceFD will ask before overwriting the cache.

Illuminate Smoke in VPR

If checked, smoke rendered using VPR in a viewport will be illuminated just like in a F9 render. You can disable this option for increased performance during preview rendering.