Gents, please stop dreaming of 32 channels. The number channels was reduced to channels 13-20, because the original App used channels that it should not have.
Unless you backed up that App version in iTunes, there is no way to go back. You cannot share it as each is digital signed to your Apple ID. Live with what you have. It works for me within the environments and ranges I operate in (within 500m and illegally tested to the max 2000m).