In blind
Cue [first cue number] thru [last cue number] enter
This selects all cues.
[old channel number] copyto copyto (this posts move to in the command line) [new channel number]
Patch display. select channel. double press copy to which will post move to. target channel enter. This will move the channel info from the selected channel number to the target channel number and get rid of the original channel number.