Plug-In Installation Locations
There are four ways that you can install FileMaker plugins, depending on where you need them to run.
FileMaker Pro (Windows or Mac)
This is the standard place that you're used to putting plugins. These plugins will run in the FileMaker Pro client software.
FileMaker Pro/Extensions
FileMaker Web Publishing Engine (Windows or Mac)
You would install plugins on the Web Publishing Engine in order to invoke them from Instant Web Publishing. On FileMaker Server 9 (and later versions), the Plugins folder may not exist - just create it and put the plugin there. Do not confuse this folder with the already existing "Extensions" folder. All 360Works plugins will run in the Web Publishing Engine.
FileMaker Server/Web Publishing/publishing-engine/wpc/Plugins
FileMaker Custom Web Publishing (Windows or Mac)
You would install plugins for Custom Web Publishing to use the FileMaker API for PHP if you want more control over the way your data displays in web browsers.
If you are running FMS 12v2 or later and have a 64-bit machine, you should use the .fmx64 plug-in included with the download.
/Library/FileMaker Server/Web Publishing/publishing-engine/cwpc/Plugins
FileMaker Server (Windows or Mac)
For most plugins, the primary reason to install them on FileMaker Server (this is NOT the same thing as the Web Publishing Engine) is to use them with scheduled scripts in FileMaker Server 9 or later (this feature is not available in earlier versions of FileMaker Server). There are a few plugins, such as AdminAnywhere, which perform other functions on the server. All 360Works plugins can be used with scheduled scripts in FileMaker Server.
FileMaker Server/Database Server/Extensions directory
Note: 360 Works plug-ins require a 32-bit Java Runtime Environment in order to run. FileMaker Pro will prompt you on startup to download the appropriate software if it is not found on your computer. But FileMaker Server has no such prompt, and you may be required to manually download a 32-bit JRE if you do not already have one. On Windows, you will need a 32-bit version of Java 7 from Oracle. On Mac, you will need the latest Java 6 update from Apple. For Mac OS 10.6, click here. For Mac OS 10.7+, click here