Converted to a proper Flightgear add-on and compatible with Flightgear 2020. Tested and it works fine.
Installation:
- Download the .zip file
- Unzip it to the folder where you are keeping your addons. You can put this folder anywhere you want, for example an addons folder in your FG data folder, or something like C:/Users/MYUSERNAME/Document/FGaddons/bombable
- Add path where you unzipped the addon files to the addon in the Launcher application in 'Add-On' section OR run FlightGear with --addon option with path to bombable like --addon="C:/Users/MYUSERNAME/Documents/FGaddons/bombable".
You'll most likely want to copy everything in zip file in the folder Bombable5.0/FGData to your FlightGear data directory. This directory includes Bombable-compatible aircraft and scenarios and that is the easy way to add them to your aircraft and AI scenarios. You can enable the scenarios via the AI menu in Flightgear.
Thanks to alexiejd for the updates!