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Don't know what happened. Earlier today I got the program guide. Somehow in my attempts to fix the Live TV I've lost it.

Yeah, I know - but it shouldnt have been showing it to you before. There is a known sequence of events that can cause it to have channels enabled in a digital capture source, without having the scanning done, and this is what you were seeing. Its now doing the expected behaviour, since all the channels are correctly disabled, and wont show the TV Guide until you manage to find channels during the scan.