If i was you i would stop worrying and lock the scales in a cupboard for a week or so.
OK so you may of put a few pounds back on but wasn't it worth it. To go to France and not eat croissants and pastry's would be utter madness (pretty sure you could also class it as a sin ) and i know i wouldn't of had a happy holiday sticking to LC when everyone else was having lovely goodies.
If going back on induction will make you feel better and you don't really mind doing it then go for it. If like me you think induction sucks then don't punish yourself for having a good holiday and go back to your normal diet the pounds will soon come off, but that happy holiday will be remembered forever.