protected ResourceFile findExtensionArchiveDirectory() {

		if (SystemUtilities.isInDevelopmentMode()) {
			return null;
		}

		if (applicationInstallationDir == null) {
			return null;
		}
		return new ResourceFile(applicationInstallationDir, "Extensions/Ghidra");
	}
Returns the directory where all Ghidra extension archives are stored.
This should be at the following location:<br>
<ul>
<li><code>{install dir}/Extensions/Ghidra</code></li>
</ul>

@return the archive folder, or null if can't be determined
Ghidra/Framework/Utility/src/main/java/ghidra/GhidraApplicationLayout.java