Is there any way to install the previous firmware for Color Bulb V2?

Hello, I would like to know if there is any way to restore the previous version of firmware for Yeelight Color Bulb V2 available out there. Now, the lights are not smart any more. I have to press the physical switch almost every time I need to turn it on or turn if off. Even, control it via both Yeelight and Mihome app is not possible.