KS-602S Smart Switch & Tuya Convert

I have a KS-602S smart switch that I’m trying to flash with a recently installed version of Tuya-Convert. I’m getting an error message when TC is trying to connect to the smart switch “Attempting to diagnose the issue … Your devices firmware is to new”. I believe the next step would be to try and serial flash the device, however I’ve grown accustom to flashing it via OTA. The device was purchased about 4 months ago (or longer) and I’m wondering if there is a solution other than resorting to a flash via serial connection? Thanking you in advance for any help that can be provided.