Managing Your Work Environment > Setting Preferences > Modules/SoftFX Preferences >

# Batch FX Cache Life Span

BFX Cache Life Span field
  Displays the number of days of BFX setups that are cached.

Batch Cache Life Span option box (Smoke in Flame Premium only)
  Select whether to set Batch setups for manual or automatic deletion.

Batch Cache Life Span field (Smoke in Flame Premium only)
  Displays the number of days of Batch setups that are cached.