"I have a 32-cam Standard. It was all jolly well set up but then I customized Xeoma to have another name and logo, and all settings went back to defaults. Do I have to reconfigure it all again?"
Xeoma stores its settings to the folder with whatever name it has. By default it's Xeoma but when you customize it & change the program name, a new folder with this name is created. And it's empty, naturally. You need to paste the settings from Xeoma folder to this {ProgramName} folder. Do that only when Xeoma is off, otherwise they won't be copied.
Directory for the Xeoma default settings & archive folder: http://felenasoft.com/xeoma/en/articles/settings/