I have checked the default key bindings as I recently loaded Corona Editor and there are no user defined bindings set up by me. I cannot save any file with ctrl+s for save from the menu.
Saving on closure of window does not work either. I did have this issue a bit prior to the addition of the plugin but not nearly as much. I get no notice of the file being in use by another program. The only time I received this prior to the plugin was when the Corona simulator was running twice and did not know that the second instance was running.
This is very frustrating.