To start the RcmdrPlugin.seeg:1.- run the R Commander by loading it as package Rcmdr or by using Commander() if the Rcmdr package is already loaded
2.- select RcmdrPlugin.seeg from menu Tools -> Load Rcmdr Plug-in(s) ...
Note: once the RcmdrPlugin.seeg has been loaded, the options()$Rcmdr should show "RcmdrPlugin.seeg" in the $plugins component.
3.- during the same R session, after the RCommander is closed, it can be re-run simply with Commander() and the RcmdrPlugin.seeg will re-run directly because of the options()$Rcmdr have been set.
Optionally, if you want RcmdrPlugin.seeg to load automatically upon starting Rcmdr set options using options(Rcmdr=list(plugins="RcmdrPlugin.seeg"))