Copy and paste the code below in "Pre-calculate." Hit save. Your project will now open with [NA] not showing by default.
Typically, the Protobi default is to "showMissing" : true. The code sets showMissing to be false on opening of the project.
if (typeof protobi !== 'undefined') {
protobi.viewModel.set({'showMissing': false})
}
return rows;