Hi ,
I have not , but it is simple enough if you have a minimum of knowledge of the Meraki API and Python ( or any scripting language )
You would have to use atleast this endpoint : https://developer.cisco.com/meraki/api-v1/#!update-network-wireless-ssid to update the SSID.
The logic could be like that :
1- Loop through all networks
2- Get the Wireless SSIDs numbers
3- Get the Wireless SSID configuration of the desired SSID
4- Update with the correct SSID configuration of the desired SSID
Voilà ! Obviously you want to test your script before running it , unless you plan on explaining why the Wifi is no longer working 🙂
EDIT: Only for MR. Not working for MX. There are no endpoints available to my knowledge.