According to the Documentation on Bootstrap Forest, you should just specify the table to use in the JSL for the platform.
i.e.
Bootstrap Forest(
Y( :Percent body fat ),
X(
:"Age (years)"n, :"Weight (lbs)"n, :"Height (inches)"n,
:"Neck circumference (cm)"n, :"Chest circumference (cm)"n,
:"Abdomen circumference (cm)"n, :"Hip circumference (cm)"n,
:"Thigh circumference (cm)"n, :"Knee circumference (cm)"n,
:"Ankle circumference (cm)"n, :"Biceps (extended) circumference (cm)"n,
:"Forearm circumference (cm)"n, :"Wrist circumference (cm)"n
),
Tuning Design Table("place your design table name here"),
Go
)
Jim