That is stored in the "xlights_rgbeffects.xml" file. Any time you share, include that file.
The recipient should create a new folder, then put the xlights_rgbeffects.xml file and then any xml sequence files into that new folder.
When you change the Setup Location to that new folder, it will load the xlights_rgbeffects.xml file, then be sure to configure your network/universes to be enough channels to cover all the defined channels.