For completeness the equivalent directory on Linux/Mac is $HOME/.fourjs/Genero Studio xxx
As discussed here
http://4js.com/fjs_forum/index.php?topic=572.0 a couple of years ago, you should apply the same guidelines when copying those configuration files between machines.
That is ...
make sure the Studio version source and target is the same
copy (or rename files) before overwriting in case you make a mistake and need to go back
do not have Studio running when you copy the config file from the source machine, or when you paste it into the destination machine.
If you aren't sure what config file something is stored, simple thing to do is open Studio, make a change to that setting, close Studio, look in that directory for a file modification time that matches.
The other thing that maybe of interest. The above link references a request to add functionality to import. That is implemented via Tools->Genero Configurations, in the icons in the top left there is one that says "Import Configurations". That simply looks in $HOME/.fourjs or %APPDATA%/FourJs for a list of configs, there is no ability to change the directory where it looks for configs to import, and there is no ability to export. For the case you describe, moving from one PC to another, and similarly in Enterprise situations ensuring all developers are equal, perhaps we need to consider adding that.