I have a genuine copy of EyeTV 4 installed on my iMac and are yet to upgrade to Ventura from Monterey. I was already under the impression that the latest version (that I have installed) was NOT compatible with Ventura and then on Mon (31st Oct) whilst EyeTV was open I had a pop-up with new software version ava for download. In the notes it says compatible with Ventura
I would suggest this the best and safest way to upgrade to the latest version which isn't currently ava on the EyeTV website for download at present. Obviously you already need to have a stable version on EyeTV installed in Monterey before you get offered this, So won't be of any use to anyone already on Ventura.