Yes, you can do it with the find/change command. When you did it you were trying to "Find" everything that was channel 11, and there isn't any. Here's what to do.
- select your track
- do the process>find/change command
The cluttered screen that comes up should have everything check by default with all the ranges defined. Basically what that is, is a "find" screen. If you leave the default, with everything checked and all the ranges, all the channels, it finds everything in the track, which is what you want. So click "OK"
The next screen looks similar but with some things grayed out. What you want to change on that screen is under ALL Non Special Events section under "Channel"
What you want to do there is put the min AND the max to be whatever channel you want it to be. If the original is channel 10 and you want it to be channel 11. Put 11 in the min box and also put 11 in the max box.
So the first time that cluttered box comes up, it's the "find" box. Once you set what to find and click OK.. Then it becomes the "change" box. Hence the "find/change" command. Find everything, only change the min/max on the channel is what you want.
gabo