I cannot find the glmCrowd line in the Plugin Manager
In order to be able to loaded by Maya, and then listed in the Plugin Manager, Golaem Crowd needs to set MAYA_MODULE_PATH environment variable.
The module path is automatically set at the install of Golaem on Windows. If the plugin line don't show up (you may have disabled the automatic setup at the install) please set MAYA_MODULE_PATH environment variable yourself in your system.