Thanks to massive support by our fellow QGIS friends at @oslandia, we @wheregroup are proud to release a new version of the Profile Manager #QGIS plugin
It allows you to copy data sources and other things between profiles, export profiles for the QGIS Deployment Toolbelt etc.
Check it out!
(And please handle it with care still, it is not too well tested yet. It does create backups without asking you btw.)