Want to make a 413 MHz receiver and transmitter for garage remote

If I had a 418 MHz or 433 MHz trinary receiver and transmitter and I needed to transmit at 413 MHz would it be possible to Change a capacitor, resistor, etc. combination to get the desired transmit/receive frequency?or is it more complicated than that?

Here is a 300 MHz version of the circuit board that I have to work with.

Also does anybody know of a way to transmit 413 MHz trinary Via an app/program using an SDR? This would probably be easier.

Would be willing to pay somebody to figure this out/do the soldering etc.

Thanks Brooks

Here’s a link to the microcontroller.