Hi bailejor,
Ok, yes you are out of date on the GWHost version. Your mcDongle should recognize your gateway as it did to recognize the modules when you updated them.
Ensure you are following the process correctly as laid out in the mcOTA guide and the mcGateway guide. When you start mcOTA, ensure your dongle is plugged in and that it is recognized by the mcOTA application. From there, you need to press 'search' and then power cycle the gateway so that the mcDongle can recognize it and then you can proceed with the update. It doesn't sound like there is anything wrong with the mcDongle since you were able to update the modules previously. Please try again and let us know how it goes.