I purchased EyeTV 4 in August because I needed a new Mac (which does not run 32 bit), and today I foolishly updated to EyeTV build 8523 and now I have no live window. It worked yesterday, prior to the update. I am running Catalina, and have done all the usual - power off, disconnect, restart, all to no avail. I had finally figured out how to edit and compact on EyeTV 4, and the update returns to the edit and compact as it was in EyeTV3. Frustrating. Since updating, EyeTV no longer recognizes the tuner, and now there is no way to see or record anything live.