I guess if you think their directions are insufficient you should take it up directly with them.
The rest was simply an outline of how you go about doing the same thing.
This video is an introduction to Expression Engine add-on development but requires experience in development.
until today I ran EE 2.8.1 because I always avoid upgrading EE. I have about 15 Modules installed (mostly commercial), which I had to update. That means make sure any custom code you write isn't going to be affected by core updates (don't hack core), and use minimal plugins by people you know will support you and keep the plugins updates, backup.
A couple keys to remember (in any CMS) is to plan for upgrade.
You're asking for major headaches if you don't...
2) What about checking the module requirements (EE version & PHP version) Updating modules like this are best left to a professional. Thanks for the constructive comments - but I guess you missed the opening paragraph - the direction to simply follow the instructions given by ..
During the video Low builds a sample add-on called Low Likes, an Expression Engine add-on to mimic Facebook likes for members of the site. It's 1 hour and 15 minutes of learning from the Expression Engine Add-on Developer of the Year.
It assumes you have intermediate PHP development experience. This course covers add-on development for Expression Engine 2.
The Expression Engine update instructions include a point where you are encouraged to put any updated add-on files in place before you run the Expression Engine updater.
However I do not recommend this since Construct 2 is not compatible with versions of Expression Engine prior to 3.
All of the code for every episode is available on the video Github repository.