Question about placement of extensions in folders

[Shawn]

I've noticed that some extensions I download have them installed in the data -> runtime folder as well as the extension folder.

What exactly is the difference between having them in the extension folder itself or the data -> runtime folder? Do I need to make sure all of my extensions are in both folders? Or is there a specific purpose for this?

[DavidN]

The difference in the copy of the extension in the data/runtime folder is that it doesn't contain all the specific code needed to interact with the extension within MMF (such as menus and dialog boxes) - this is the copy used in compiled MMF applications. Extensions without a copy in the data/runtime folder will still work fine, they just won't have the small space saving that comes from using the specific runtime copy.

[JimJam]

Makes sense. So basically some need it, some don't.