No need to do a CDE. Just repeating Guided Setup will rest all the channels in the list to the default for your zip code (under Bad_Rovi, this will be all channels in your DMA, which WILL include a lot that you cannot receive). To my knowledge, there is no way at all to remove all the bogus channels that Bad_Rovi now includes in the default list - you just have to know which ones to leave un-checked.
But first, just try to Delete previously scanned channels under the Channel scan menu.
BTW - any channel in the list shown with an * was added by doing local channel scans instead of being part of the TiVo lineup list, and just hitting Clear while looking at the channel list should remove all of these.
You can compare your current channel list to the TiVo default for your zip code by just going to TiVo Online and setting your zip code and provider (OTA?) there.
But first, just try to Delete previously scanned channels under the Channel scan menu.
BTW - any channel in the list shown with an * was added by doing local channel scans instead of being part of the TiVo lineup list, and just hitting Clear while looking at the channel list should remove all of these.
You can compare your current channel list to the TiVo default for your zip code by just going to TiVo Online and setting your zip code and provider (OTA?) there.