Got a partial answer so I'm posting it here in case anyone else needs it:
Columns - when you change the columns in Remote Sequencer, it will remember that layout without need to save it. You can close the app and next time you open it, the columns will remain as you set them.
Colors - under the installation path for Remote Sequencer there will be a preferences.DAT file where you can modify what colors are displayed. The value of the color is in decimal value.
#XPression