Hello again, thanks for helping each other. Play Store does not allow all devices to be updated at the same time and it may take a while to release the final version to all, so if you have update problems I leave the link of the 3 applications:
Watch Droid Phone 15.10.40.10
Watch Droid Assistant 15.10.40.10
Watch Droid Assistant - WearOs 15.10.40.10
It is very important to restart the smartwatch after updating for a correct start of the application and lower battery consumption.