File Name- Eaglercraft-launcher-1.5.2.zip ((top)) -

If the ZIP is a "Desktop Runtime" version, it may also include:

The main entry point to launch the game in a browser. File Name- Eaglercraft-Launcher-1.5.2.zip

Browser privacy settings block local storage. Fix: Ensure third-party cookies are allowed for the local file ( file:// protocol). In Chrome, add file:///* to “Sites that can always use cookies.” If the ZIP is a "Desktop Runtime" version,

The file is a container file, typically containing the executable files, scripts, and necessary resources to run a local or offline version of this web-based Minecraft. Why Version 1.5.2? typically containing the executable files