Script to Enable Generator in Photoshop?

To toggle the checked menu on an open doc:

var idAdobeScriptAutomationspScripts = stringIDToTypeID("AdobeScriptAutomation Scripts");
var desc326 = new ActionDescriptor();
var idjavaScriptName = stringIDToTypeID("javaScriptName");
desc326.putString(idjavaScriptName, """Image Assets""");
executeAction(idAdobeScriptAutomationspScripts, desc326, DialogModes.NO);
app.beep();

Or:

AdobeScriptAutomationScripts("Image Assets");
app.beep();

function AdobeScriptAutomationScripts(javaScriptName) {
    var s2t = function (s) {
        return app.stringIDToTypeID(s);
    };
    var descriptor = new ActionDescriptor();
    descriptor.putString(s2t("javaScriptName"), javaScriptName);
    executeAction(s2t("AdobeScriptAutomation Scripts"), descriptor, DialogModes.NO);
}

Or:

$.evalFile(File(app.path + '/Presets/Scripts/generate.jsx'));
app.beep();

Feel free to remove the beep, it's just there to let you know that something happened, it could as well have been an alert.