Webcam Dropbox Uploader - a plugin to store images to dropbox

Just installed the V2 of this plugin. Easy to load, Easy to configure, Easy to setup the DropBox link. I am running firmware version 1.7.2044 on a VeraPlus. Everything seems to be working fine and I am getting an image from all 7 cameras every 10 minutes. I do have some questions. I would like to send images from only 5 of the 7 cameras. I see several posts referencing some Lua code which lets you select one camera. Can you select 5 of 7? Where do you enter the code? The plugin does have a .LUA, .JSON, .XML and .XMLEMC file. Are you suggesting we edit one of these files? What is the format to enter more then one camera? (ul_settings[“webcamNumber”]=71, 72, 75, 76, 77)