FEM import plugins can be installed anywhere on the user's machine. The location of the plugin is a database specific setting which enables multiple plugins to exist on a single machine. A template database can be used to ensure that the database is preconfigured with the proper plugin location. See About Template Databases.
How to install a FEM import plugin
In the menu bar, go to Preferences | Plugins. See Database Plugin Options.
Browse to the folder location of the DLL.