If your HPlus was flying the way you wanted before this incident, I would say it is best to leave it on it's current firmware, and just match the new APP to what you already have. After you get the new APP installed, bind to the HPlus and take a screenshot of the firmware page. Then we can discuss any changes you need, or any you would just prefer.
The "Screenshot" button is the middle button at the bottom of your screen. Shaped something like a house. Just hold it a few seconds and it will record the screenshot to the controller's internal memory, which can be accessed from your computer via USB, or copied to an SD card inserted into the controller. Or just take a picture of the screen with some other camera, works just as well.