Not sure about KPG-89, but in KPG-135 for the TK-7360 you can click on the channel numbers on the left and select one or multiple rows, then right click to copy, paste or delete all of the channel information in that row(s). You can move channels around this way by copying and pasting them.
Not quite as easy as Icom software for example, where you can just click on a channel and press CTRL+UP to move it up in the list; but at least you don't have to type it all in manually again.