you must have had a very old version of this plugin. Yes some time ago I did away with the reload_code.js file.
Now all reload codes are handled in your wordpress admin panel, go to "settings > Advanced Ajax Page Loader" and look at the "reload codes" input box.
This means any updates in future retain your reload code and obviously also means you no longer have to manually edit files which is nasty.
The commercial purchase option is for those using AAPL on commercial websites, this means a site selling products or services and making money. Or someone who is installing AAPL for a client that is paying them for the work.
If you make a donation I have been pretty lenient to just add you as "commercial" licensed as a thank you :)