League Manager has many options for stroke control or ESC.

You can choose: No stroke reduction; USGA - Equitable Stroke Control; OLD USGA - ESC (Pre-1993); or set up your league's Constant Maximum Strokes Allowed.

To find these options, click on 'Setup' on your toolbar and select 'Handicap Calculation Parameters'.
When the 'Handicap Parameters' box pops up, click on the "Stroke Control' tab.