Silicone rubber keypad TX can be upgraded.
Do not upgrade the plastic keypad transmitter manufactured earlier.

On Board RX:
OnBoard Crest Patch file
Please program with the patch file(OnBoardCrestPatch1.zip)  first and then reprogram the desired file.
We are not responsible for any problems arising from the reprogram of Crest(TM) products.

I wanted to know if anyone has tried it yet. This was posted after Dave,s comments.