This is the internal version that I use for my apps. Unless you have a reason please use the official version. If you use this plugin and have not registered with Appodeal please consider using my link:
How to use:
Use the links from here but otherwise, the interface is identical to the official version (because it is simply a repackaging of the official version).
Once you've activated this plugin, appropriate build.settings code will be generated for you to copy into your Solar2D project. Download links will also be available for inclusion into a Solar2D Native project.